now its in qna .. any way ,
915 doesnt support 98 . u can get into 98 only in the safe mode. i found some bioses that offer options so that 98 can be used on 915 . all the same , intel aint provinding graphics drivers for 915 on 98 anymore. so it wud just be like safe mode with 16colors.
OR u hav to install some old old PCI graphics card , worse than ur onboard graphics and try it.
if u ask its not worth it.