1supermiguel

Are you referring to something like this? 
fbi (unmarked Bravado Buffalo 1st Gen)
fbi2 (unmarked Declasse Granger)
police (LSPD Vapid Stanier 2nd Gen)
police2 (LSPD Bravado Buffalo 1st Gen)
police3 (LSPD Vapid Interceptor)
police4 (unmarked Vapid Stanier 2nd Gen)
policeb (LSPD police bike)
policet (LSPD police transport)
policeold1 (North Yankton Declasse Rancher)
policeold2 (North Yankton Albany Esperanto)
pranger (Park Ranger Declasse Granger)
riot (LSPD/NOoSE Riot)
sheriff (LSSD Vapid Stanier 2nd Gen)
sheriff2 (LSSD Declasse Granger)
(Credits go to Police car mods: the whys and hows, and troubleshooting)

Well, normally the method I mentioned should fix the siren issue. Now, vehicle.meta files do exist in some patchday folders; however, they generally only change some vehicles. The latest vehicle.meta files in those folders is under mpxmas_604490. If the file path I suggested doesn't work, try mods/update/x64/dlcpacks/mpxmas_604490. 
***Now you will need to navigate to my first suggestion ( mods/update/update.rpf/common/data/levels/gta5 ) and use ctrl + f to find, for example, fbi2. Copy from                     <Item>  to  </Item>. These are the starting and finishing lines for a vehicle. Copy, then navigate back to mods/update/x64/dlcpacks/mpxmas_604490, open the .meta file on your desktop and paste your original fbi2 text just below <InitDatas>. Now follow the method in my first post to change the siren and engine noises. 

I looked around a bit and used your method. Works like a charm! Thanks for all the useful info!

Go to mods/update/update.rpf/common/data/levels/gta5 and open vehicles.meta (click and drag to desktop, then double click that baby) press ctrl+f to search for "sheriff2," "policeb", "fbi", "fbi2" or whichever vehicle audio hash you want to change.  
Now, below the name of the vehicle, in the pile of text, there is a line that starts with <audioNameHash/>. Delete that bit and paste this <audioNameHash>police</audioNameHash> into that empty space. It should look like this: <ptfxAssetName>null</ptfxAssetName>
                                                                                                                                                    <audioNameHash>police</audioNameHash>
                                                                                                                                                    <layout>LAYOUT_STANDARD</layout>
*NOTE* This will change not only the siren, but also engine noises for the vehicle.

you've been a criminal, bud.

I beg to differ. If Take2 has these opinions on just OpenIV, then Scripthook, RagePluginHook, FR, 5m...they're all in danger now.

Take Two can take £0 from me from now on.

Mate, I'm not uninstalling SHIT, modding is legal whether some big corporation likes it or not.

They did make it legit haha. Especially the way it's filmed, giving it the COPS intro. Actually i think they even had some real LASD deputies in there aswell. I never saw the episode until i re-watched the entire series on DVD.. i was laughing the whole way through.
 
although if i never saw X Files before, i would've thought that it was a real episode of COPS. 

The first episode is on YouTube.. a lot different setup to what it is now, in the first episode the crew followed the officers to their home. rather than just ending it on the 'scene'
 
Although my favourite COPS episode (although technically not COPS) is the X-Files episode (X-Cops) which was heavily inspired by COPS and filmed so "As it happens" Quite hilarious.

Buddy, it's been around since 1989.

That last part in the intro is what inspired the scene from SouthLAnd where John Cooper (post-back surgery) jumps into the car that is reversing in circles while his partner (Jessica Tang?) watches on. 
 
the video is cool to see, I haven't seen many 90's COPS episodes

Rockstar don't like mods and have a lot of computing power at their disposal.... just sayin' ;)
 
In all seriousness though, it might well not be this site getting attacked specifically. It could be the server it is hosted on if it also runs something that is a target.

Why does anyone really do anything. Generally it's either; Hate, Fun or Because they can. 

It's not as if the guilty party is going to raise their hand.

I guess I'll finally starting playing GTA & LSPDFR again. Awesome job to the devs!

Emergency Lighting System for GTA V 
 
After much waiting and anticipation, the time has finally come.  Emergency Lighting System for Grand Theft Auto V is now available.  Much like its predecessor for GTA IV, ELS-V brings hundreds of new lighting patterns, a bunch of siren options and a beautiful new interface for controlling your vehicle's emergency equipment.  Developed by our own @Lt.Caine and @LMS, ELS-V is a must-have for any one that enjoys realistic police and emergency vehicles in their game.  
 

 
Realism Dispatch Enhanced 
 
As if the release of ELS-V wasn't enough, we've also been spoiled today by the latest release of Realism Dispatch Enhanced.  RDE is a massive modification that brings loads of new lore-friendly models and textures for vehicles, models and even police stations.  Also new in RDE 3.0 is a custom wanted level system that not only re-introduces the six star wanted level, but also fully utilizes all of the new assets added by the RDE modification, meaning that should the player become wanted in the airport, for example, they will be chased by airport police.
 

 
Both of these modifications are available in our Downloads section now

How to add vehicles in game with working engine sounds and correct vehicle colors
 
Hello guys, I am glad to announce you all on the forums that we can add any vehicles on the game with working engine sounds and correct colors for each vehicle, It is possible too to add boats and helicopters on the game without any limitations unlike other GTA games, Also this is more surprising that we can also add emergency vehicles on the game with working siren lights and it's siren sounds properly, No extra script to do so.
 
So before we can start, You should read the notes first.
 
1,) You cannot add the new added vehicles on specified section of dispatch.meta
 
Alright this is most annoying thing on adding new emergency vehicles as If you add a Police SUV and put the name on SWAT_SUV section, It will spawns empty, No cops drive it, It just wandering around like a normal car, I don't know if this is hardcored or it still can be edited on a file or native script.
 
This also does not work on new added Fire truck too, They're still spawns with driver and passengers but it does not responds to fire, I don't know why but I'd recommend not to add the new vehicles to those sections of dispatch.meta
 
2.) I am not responsible for breaking your game as if your game were broken because of this, Until you have a specified problem about siren lights or vehicle colors, You're welcome to ask.
 
Alright, If you read the notes, Let's get started.
 
First, You should add the models first to x64e/levels/gta5/vehicles.rpf
 
Then, You should add your own lines to vehicles.meta, Either from update.rpf or mpchristmas2.rpf or mpheist.rpf
There are the example of the lines from vehicles.meta, You should use notepad or similar program to edit vehicles.meta
 
Example:
 
Then, You should add this lines on vehicles.meta too:
<Item> <parent>vehicles_poltax_interior</parent> <child>model_name</child> </Item>It will have interior textures on the new added vehicle.
 
You should add vehicle audio hash on vehicles.meta too or it will not have any vehicle sound:
<audioNameHash>9F</audioNameHash> 
Example: You should use existing internal name from vehicles.meta like Stanier police cruiser is "police" or Interceptor cruiser is "police3", So the sound will work on the new added vehicle.
 
After you added your own lines, Please save your notepad or similar programs.
 
Then, This is about it's vehicle colors, lights, siren lights and it's liveries, It is located carvariations.meta unfortunately the original one is compiled as .ymt file but there are another way to add vehicle colors which is located from mpchristmas2 or mpheist dlc files.
 
You should add this lines to the end of carvariations.meta
 
About liveries, You can add the liveries as long the vehicle models have liveries placed on it's models.
Liveries:
<Item> <indices content="char_array"> 134 134 0 156 </indices> <liveries> <Item value="false" /> <Item value="false" /> <Item value="false" /> <Item value="false" /> <Item value="false" /> <Item value="false" /> <Item value="false" /> <Item value="false" /> </liveries> </Item>If you set one of them to "true", The new added vehicle will have liveries attached to the vehicle, Do not set the item value "true" one the same line, It will glitch out the liveries unless, If you wanna add the new liveries, You should add this lines.
<Item> <indices content="char_array"> 134 134 0 156 </indices> <liveries> <Item value="true" /> <Item value="false" /> <Item value="false" /> <Item value="false" /> <Item value="false" /> <Item value="false" /> <Item value="false" /> <Item value="false" /> </liveries> </Item> <Item> <indices content="char_array"> 134 134 0 156 </indices> <liveries> <Item value="false" /> <Item value="true" /> <Item value="false" /> <Item value="false" /> <Item value="false" /> <Item value="false" /> <Item value="false" /> <Item value="false" /> </liveries> </Item> 
About siren lights, There are varies of siren lights from several emergency vehicles that can be used, But be careful, Wrong siren lights will glitch out the siren bar on desired added vehicle, So I listed several working siren lights that you should use.
<sirenSettings value="1" /> = This siren lights is used by Police Buffalo, Police Riot, Park Ranger SUV and Sheriff Granger. <sirenSettings value="2" /> = This siren lights is used by Police Interceptor. <sirenSettings value="4" /> = This siren lights is used by Ambulance. <sirenSettings value="5" /> = This siren lights is used by NYSP Police Roadcruiser, NYSP Police Rancher and LSPD Police Transporter. <sirenSettings value="6" /> = This siren lights is used by Police Bike <sirenSettings value="7" /> = This siren lights is used by Fire Truck <sirenSettings value="9" /> = This siren lights is used by Tow Truck and one of Boxville models. <sirenSettings value="10" /> = This siren lights is used by Lifeguard SUV. <sirenSettings value="13" /> = This siren lights is used by Stanier Police Cruiser and Sheriff Cruiser. Then you're done with adding the new vehicle, You can test it in game by trainer or RAGE Hook, or for emergency vehicles, You can use dispatch.meta to spawn the new vehicle on wanted level as long it does not belong to "SWAT_SUV" and "FIRE_TRUCK" section of dispatch.meta.

After what has to have been the most chaotic night in the history of LCPDFR/LSPDFR, I'm happy to announce that the third public release of LSPDFR, LSPD First Response 0.3, is now available for download.  LSPDFR 0.3 brings with it many exciting changes and features, including some amazing developments we've made with the Downtown Police Station, beautifully seamless arresting animation sequences, and a whole range of general improvements across the board.
On a similar note, we hope that you enjoyed the livestream provided on our new Twitch channel at http://www.twitch.tv/g17media.  We appreciate that there were some teething issues with this over the night, but we also hope that you can appreciate the amount of work that goes into putting together not only something like that, but also preparing the modification for release at the same time!  (If you'd like some quantification of that, every member of the management team here has dedicated the entirety of their days today to LSPDFR - seriously, we've barely even eaten!)
I'd also like to say a massive thank you to @JFavignano and @Stevetrackboyz for being a part of the action tonight.  Indeed, I hope that everyone else will join me in showing their appreciation - you guys were absolutely fantastic!
We highly recommend that you take a look at the LSPDFR 0.3 Feature Guide, located here: http://www.lcpdfr.com/lspdfr/features.  This guide highlights some of the new features available in greater detail, and also provides more complete release notes (which are massive).
LSPDFR 0.3, now complete with automatic and manual installation packages is available below: 

 
On behalf of the team,
Sam.

try to use the vehicles meta and rename the audio name hash
<audioNameHash>police</audioNameHash>

Actually, you should be able to edit the carvariations.meta, look for INSURGENT2 and change
to any of these: 
 
Then you wouldn't have to replace any model. I haven't tried it on existing models yet, but it SHOULD add sirens to the vehicle, as it's the same method used when you add new police car models to the game.
 
EDIT: This should also influence the siren used (as there is several different sirens in the game) and also to some extent the flash pattern (if I'm not totally mistaken)

Approach and individual on foot and wait until you are prompted in the top right to press (E). Generally to get the prompt up you must be standing in front of the individual facing each other.

You need to export the .meta files and edit them in a program like Notepad.

Not gonna lie I almost messaged everyone that 0.3 had been released... don't do that to me man :( The  LSPDFR 0.3 - November Update title can be very misleading!! :P I can't be alone