OfficerMarcin

Okay. I don't know what is wrong. And this topic is all over the place, and I do not understand what you want. 
 
Run the game as administrator. Make sure you have the latest patch. Make sure it isn't a crack. Read all manuals and guides. 

The mod works fine for me! Make sure you've installed the newest Patch, that you have an asi loader and wait a few seconds to let the mod start.

You not getting a wanted level while LCPDFR is on and you're a cop, but once you are a civilian again, then yeah... You'll probably get all 5 stars

You need to install this: http://www.hazardx.com/details.php?file=83  Then you have a working script folder! 

>Vanilla Vehicles Database
 
Take a look through the ELS list to see if anything works for you.

Police Cruiser: http://gtapolicemods.com/downloads.php?do=file&id=354
 
Default Vehicles Pack: '?do=embed' frameborder='0' data-embedContent>>
 
Default Vehicles Pack II: '?do=embed' frameborder='0' data-embedContent>>
 
GTAV's Taurus: '?do=embed' frameborder='0' data-embedContent>>
 
GTAV's Charger: '?do=embed' frameborder='0' data-embedContent>>
 
Hope that helps!

Calm down. You're doing it wrong here. Read the readmes. Timesyc isn't a script.

Yes, LCPDFR will open all the bridges when you are playing as a officer. You might want to disable wanted level with a trainer to be on the safe side though. 

Or just use the trainer to switch between missions etc. Anyway, hope you solve it. I did my best lol.