it's my understanding to flash a tsop certain "write protects" have to be shorted out, i.e. additional solder points, or at the least, additional wire connections. i have not heard of the xbit having that capability - i do know the chameleon can do it - my suggestion? leave your motherboard alone - if you want to "disable" the xbit for live, then use a loaded original bios in one of the xbit banks while the xbit is operating - i asked a similar question in the newbie section and that is the reply i got - although i don't have live and haven't tried it, so i'd hate for you to get banned...but if you're using a stock bios, even on a mod chip, then i don't know how the system would know it's a mod...of course, using a stock bios on the mod chip means you'd have a stock system while that bios is in effect - at least that's my understanding.
i don't think your messed up tsop would accept an exploit to load a stock bios - as you'd have to load via the mod chip, but i could be wrong...