go to nforcershq.com, and check the asus forum, they'll help you out, they have convinced me to ditch my 2500+ to a customers system for a 2500+ Mobile
ditch the asus and get either an abit nf7-s v2 or the dfi infinity/ultra. they are both far better boards and dont suffer bios corruption like the asus's do.
bios corruption, FYI, is very common with the asus nforce2 boards, at least when running them above 200mhz fsb (and who wouldn't?). The nf7's and the dfi's are 99% imune to it since they take preventative measures - hence the reason i recommended them....FYI