To successfully use a trainer with the v1.2 patch, follow these general steps:
Download the trainer from reputable classic gaming or modding repositories. nfsu2 trainer 1.2
If you are using community LAN emulation tools (like CNCNet or VPNs) to play multiplayer with friends, disable the trainer entirely. Using trainers in multiplayer environments ruins the competitive balance and will get you banned from community servers. To successfully use a trainer with the v1