Hi, Ron.
I have always done format C: /s from a DOS prompt to format my
hard drive.
Yes - and no. You've done this only after booting from a DOS floppy - NOT
from Drive C:. Even DOS will format the drive that it is currently running
on. In other words, you couldn't boot to Drive C: and then format Drive
C: - you had to boot from a boot floppy run FDISK or Format C:.
To format the "system partition" (almost always Drive C

or the "boot
volume" (often also Drive C

, boot from the WinXP CD-ROM and accept the
early offer to repartition (optional) and reformat the drive. Be careful to
limit the space to be used unless you want the whole HD to be in a single
partition.
After you have WinXP installed and running, use Disk Management to create,
delete or format any other volumes (primary partitions or logical drives in
the extended partition) that you want, and to assign or reassign drive
letters. The quickest way to find Disk Management is to type "diskmgmt.msc"
at the Run prompt. Study this program and its Help file carefully; there's
a lot to learn here!
Then you can throw away your Win9x/ME boot floppy (or at least hide it so
that you won't be tempted to use it). You'll probably never need it or
FDISK or Format.exe again.
RC