Any how,

Last time I repartitioned a hard drive (several years ago), it was something like an 85%, 15% partition. I ended up losing access to the 15% completely some how. That's just a little background stupidity info for my question.

When you install Win2k, you have the option at some point to repartition the drive(s). If I'm taking 2 virtual drives and repartitioning them back into one whole drive, what are the specific steps to not f*** it up? I only ask, because this is my dad's boss's computer, and I don't feel like hearing a bunch of crap if it gets hosed.