If you don't have a floppy use
this . You'll be able to boot from the CD-ROM and format your hard disk in DOS.
From the README:
The file you will download will be a zipped .iso image file of the
bootable Disk. Unzip the file, then use a burning program which can
burn images including .iso's such as Nero. When booting from the CD
the Boot Files will be seen as Drive A: and the Utlilties will be
seen as Drive R:
The utilities are separated from the boot files so you can use them in
Windows without booting from the CD.
Before using this disk make sure you set your BIOS to boot from the CD
drive first, and make sure the channel it's on is set to AUTO. Also note
that the CD drive you want to boot from often likes to be set as a
Master Drive.
You may be thinking why use this CD when the Windows CD is bootable?
Well, two main reasons. This disk has the tools you need to totally
clean your hard drive of EVERYTHING. Secondly, it allows you to to
install XP from your hard drive which has some advantages prior to, and
during the install and also, later on after XP is running.
Other reasons include being able to run a full scandisk on your hard
drive before you use it again to see if there are any bad sectors that
need to be marked bad.
The bootable CD boots to a menu where you can choose one of the four
universal CDrom drivers. This is necessary to read and use other cdrom
disks after booting up with this disk.
It includes the utilities you may need to bring your hard drive back to
a factory fresh state to help guarantee a successful Windows installation.
Once you've booted from the CD you made you can now setup your
hard drive [fdisk, format, zero fill, wipe out all partitions etc.] and
properly prepare it for a 100% fresh install on a squeaky clean disk.