i have found out how to mod MUD FIM Motocross game save as wall.
if you wont your save modded post up your save with your MONEY amount and i will mod it for you.
here's my own modded save with $999,999,999 on it http://www.mediafire.com/?sdnl21u3cmnp9sz
here are the steps to get it working on your Xbox 360 console
1. extract the file
2. open 360Revolution or Xbox 360 Tools
3. drag my save on to one of the programs above
4. put your profile id and device id in the save
5. click on rehash and resign
6. i want you to let me sniff your vagina