Gatorator

Do you use Menyoo? 
 
Go to MenyooStuff - menyooConfig.ini - open it with Notepad. 
 
Search "[object-spooner]," and find the following settings: "SpawnDynamicPeds = 1, SpawnDynamicVehicles = 1, SpawnStillPeds = 1" Change all of the values to 0 (zero), then save. 

Fellow bejojio patron user here. In order to check the vin, you must exit your car and walk up to the vehicle. Now, I don't quite remember but you may or may not need to get the ped out of their vehicle as well to check it. Hope this helps!

Because someone decided to bump the thread really stupidly, we're going to have to start a new topic. Let's get some things straight.
 
GTAPOLICEMODS HAS CLOSED DOWN, AND WILL NOT RETURN. Sure, we were slightly malinformed, but if the infrastructure and pageviews are failing, its what they have to do.
MODELS ARE NOT CURRENTLY DOWNLOADABLE. This is the most serious effect - two of my mods cannot be used with non-els cars now, a large percentage of LCPDFR models retextures cannot be used because the site is down.
A MOD ARCHIVE IS TO BE SET UP ON HIGHSPEED-GAMING.COM, HOWEVER NO DATE HAS BEEN GIVEN.  BxBugs told me, however, nothing much has happened since. However, he has released some 'critical' GTA IV mods onto the site by one or two people's request. Currently, we have to wait patiently until the archive is up and running to get your mods back.
 
I hope this is informative for you. Its a real shame it had to close down, and I wish everyone the best who is trying to recover and reupload.
 
EDIT: It's nearly been five months since I created this topic, and nearly a whole year on, we've had no answer. GTAPoliceMods is well and truly dead. The odds of it coming back are starting to slim out, and reuploading of mods has not happened. I would reupload what I have in my folders, but for one, it is technically piracy, and also, I may not possess all that is required for some of the mods.
 
But worry not! The fight isn't over! There is still hope it will come back. Someday.

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)