Return from certain crash - 1 more problem

Ok. My brother installed some software a while ago and after that the PC just wouldn't boot. It was tracked down into being a corrupted AutoExec.bat... we tried the autoexec from a PC at work and failure again. I was fiddling with it last night, got it into safe mode, and then into 'proper' mode with the step thru thing, running all but the autoexec. For some reason I had to re-install my GFX drivers from my CD ;) and now it all seems to work fine!! BUT - when I boot it always goes to the windows startup menu. I hit normal mode and its fine! How do i stop it showing that? Like I said, its '98SE.
Thanks guys, Dan
Thanks guys, Dan