Dude, you should go to
http://www.bootdisk.com
download something along the lines of a boot disk with all the commands
format a floppy disk and chuck all that stuff into it
once you've done that, stick the disk in and boot it baby
now you are here
A:>
type this:
format C:
ones it has been formatted reboot and go to bios setup
enable boot from CD
stick in your windows CD
save changes and exit
windows does the rest, just follow the instructions
that should be it, but if not then ask more questions
good luck, if you really can't get it to work then go to a shop and pay for it