You can "reformat" any partition as long as it is not the Boot partition any number of ways under Win2K/XP:
1. Windows Explorer ... right click left pane partition ID (D:, E:, etc.) and simply choose format.
2. Use command console (if you've installed it), enter diskpart <return> and up pops the fdisk replacement permitting a partition format. #1 above is easier.
3. Boot to Win install CD. After initial code load you are presented with options to install new or repair existing installation. Choose repair and then invoke command console.
Ed