LuciusAvette

Hey there.
If you notice the way how those callout plugins are placed in the directories when you downloaded them, just place them according to what you see.
E.g.
CallOutsV
- LSPDFR folder
- Plugins folder
 
You will see both folders in your GTA V main directory as well. Just copy both folders into your main directory. Once you get on duty, the plugin will load with a popup in a rectangular box above your map.
As for vehicles, there are two types namely an "Addon" and a "Replace". Exactly what it means, an Addon is an add-on while a replace is replacing the vehicle as one of your current GTAV vehicle.
In the case of "Addon" vehicles, you require a modified "gameconfig.xml" file which allows custom vehicles as well as several things in order to get it to work!

You should have backups made with RPH.
Fire up RPH, click on the "cog" icon to open up the settings > Game Settings > Revert game version. Check that it is within range of the supported RPH version. For me, I'm on version 791.
Then disable GTA V auto-update > Play!

Wow maximum 2000ms?

1) Are you using wireless or do you have a physical connection to your internet router? Something can be interfering with your wireless connection. Phones, or just your neighbor's wireless connection, etc. Also someone could be leeching your internet if they manage to connect to your wireless network.

2) Usually rebooting the router can help. Turn off your router, wait 30 seconds, turn it back on again.

3) Not enough bandwidth for your neighborhood. Think of internet cable as a water tab that originate from one end of the street to the end. Chances are you won't get much water if the house upstream using all your bandwidth. You can call your provider and complain about it.

4) Somehow the cable that's providing internet has been damaged. If you call your service provider they can check it on their end and hopefully fix it.

 

These are the related files.
mods\update\update.rpf\common\data\dispatch.meta mods\update\update.rpf\common\data\gameconfig.xml mods\update\update.rpf\common\data\pedhealth.meta mods\update\update.rpf\common\data\pedperception.meta mods\update\update.rpf\common\data\ai\crimeinformation.meta mods\update\update.rpf\common\data\ai\crimes.meta mods\update\update.rpf\common\data\ai\loadouts.meta mods\update\update.rpf\common\data\ai\motivations.meta mods\update\update.rpf\common\data\ai\pedaccuracy.meta mods\update\update.rpf\common\data\ai\pedbrawlingstyle.meta mods\update\update.rpf\common\data\ai\vehicleaihandlinginfo.meta mods\update\update.rpf\common\data\ai\agitatedtriggers.meta mods\update\update.rpf\common\data\ai\ambientpedmodelsets.meta mods\update\update.rpf\common\data\ai\combatbehaviour.meta mods\update\update.rpf\x64\data\tune\randomevents.ymt mods\update\update.rpf\x64\data\tune\vehicleaitasks.ymt mods\update\update.rpf\x64\data\tune\wantedtuning.ymt mods\update\update.rpf\x64\data\tune\dispatchtuning.ymt mods\update\update.rpf\x64\data\tune\generaltasks.ymt mods\common.rpf\data\naturalmotion\behaviours.xml mods\update\update.rpf\common\data\naturalmotion\behaviours.xml What I've done is a clean re-installation of GTA V to flush out all my errors made to prevent anymore issues on my next try so it is best recommended to do that. 
After that, install Redux manually. You could possibly use automatic installation and pick the files out one by one but I did the longer way.