Mechwarrior 4: Mercenaries Message Board  

Unfortunately the trainer request thread states a game has to be no older than 12 months. This may not be in the request thread, but the same rules apply. I have noticed some exceptions, but... not many. It's a shame really; this was a great game back in the day and it's stood the test of time quite well, considering how quickly the games market moves on. Probably still is a great game, but I haven't played it in so long.

Considering it's such an old game, it might not actually be too hard to use CoSMOS, or similar, to make your own little cheats. Older games tend to have less protection against cheating. I'd give it a go myself if I still had it.