well, if the partitions are not ntfs, you can just use a win98 boot disk and fdisk and reformat as usual. if the partitions are ntfs you need to run the 3 setup disks and when you come to the partition info section, just delete them. if you dont have the disks, you can make them on another nt system by running the winnt or winnt32 /ox command with the os disk in the cd drive.
...and i would have gotten away with it, if it weren't for you meddling kids...