Ok Here we go, the Beta Version of the Mega Trainer is released.
Just the basic stuff, may be buggy though.

WARNING 1
Please backup your savegame before using this trainer, I will not be responsible for any corruption of savegames. This is a initial release of the trainer, bug reports and comments are welcomed.

WARNING 2
Avoid cheating online. I'm unaware of the consequences if you were to be caught. Perhaps having your account blocked?

Note
Make sure your Windows Control Panel "Regional and Langauge Options" has the "language for non-Unicode programs" under the "Advanced" tab set to "English (United States)". The game or trainer might crash otherwise.

People having similar problems with the NFSU1/2 MegaTrainer crashing the game once any cheats are enabled, the above is the solution. I've posted the remedy in many sites but the info doesn't seem to spead around. Anyway, do take note.