The Police Car: Blue (GTA 3 beta) white (GTA VC beta) and black (GTA SA)

The Enforcer: Blue (GTA 3 beta) white, and black (GTA SA)

The Police Helicopter: Blue (GTA 3) white, and black (GTA SA)

 *Replace the carcols.dat with the modded one in the GTA VC game folder*

 *Also make backups just incase you want the old car colors back*