bad news, the two games have seperate game saves, which means their incompatible with each other (blame rockstar)
so you might need to delete your game saves and start over. (make a backup just incase)
another reason it might've crashed is it might be the wrong xbe. If you have a PAL xbox, you need to use this patch instead:http://www.invisionplus.net/forums/index.p...p;showtopic=101
also be sure to test all this without any other mods installed. once it boots up, THEN you can try to install other mods such as vehicles, reskins ect.
and as a side note, you should be able to download game saves from xbox-saves from the san andreas V1.0 sections since your essientially running a v1.0 xbe now. But for testing reasons, try to boot up clean with no game saves to see if it works and game from there.
hope this helps