Talkgroup? Sounds to me like you're trying to program in a trunk system.
NYSP Troop B uses 154.905 for base to car transmissions, and 155.595 for car to base transmissions.
Scanners: BC250D, BCD436HP, 2 BCD536HP's, 2 996XT's, PRO-92
Ham: Icom 208H, Kenwood TM-V71 dual band
Pro: Icom's F3061, F4061, F5061, Motorola CDM1250 VHF & UHF