I think you should stop helping people with hacking, they should learn it the hard way, like me, trial and improvement. If everyone knows how to cheat, xbconnect would be full of extremely fast cars and the races will be based on hacking/editing skills aswell as driving skills (though this could be a good thing unless it gets out of hand). So all I'm saying is use edited cars for your own use, and don't cheat (too much) when you play on system link online.
By the way, I think when you change anthing to do with revlimit - you have to change gears manuely.