tlow,
After you resolve the issue of booting to a floppy disk, get to a dos prompt and type the following...
at the prompt type 'DEBUG' and press enter. (please ignore the gasps of horror of the other readers who tell you debug is an evil terror not to be used by the faint of heart.)
debug will put a single dash (-) as it's prompt for you. I'm going to list what to type which will clear your partition entirely. type everything you see between the single parenthesis exactly as seen.
at the first prompt type 'f200 400 0' then press enter.
type 'RAX' & press enter
this displays AX0000 and then shows a colon
type '301' and press enter.
again, you are at a dash. type 'RBX' enter
you see BX0000 and another colon.
type '200' & press enter.
at the next dash, type 'RCX' & enter.
you'll see CX0000
type '1' & enter.
another dash, type 'RDX' & enter.
you'll see DX0000
type '80' & enter.
another dash, type 'E100 CD 13' & enter.
type 'p' & enter.
type 'q' & enter.
restart the computer and see if you can boot to your floppy, then run fdisk.
**Warning** Debug is not something to be done if you don't have explicit instructions or know what you are doing (or preferably both). I've used this method to clear hard drives on more than one occasion, so I know it works.
Good luck. hg