There is no trainer compatible with the ultimate vice city mod......
but you can update it to the version 2.1 and use the ultimate vice city trainer....
that is wen u install the mod there will be 2 back up files created in your GTA3.img folder.You gotta delete it.
Now delete the backup of the gta_backup.exe and replace the GTA_VC.EXE in your folder with GTA_VC.EXE version 1.0.
It'll work coz i made it work like that only...........