if you have Windows XP, here's a link that should help you out:
http://rcc.bgsu.edu/computing/xpformat/
i just googled it real quick-like. should do the trick.
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or you could just get a boot disk with DOS on it, format your hard drive, get your cdrom working in DOS, and reinstall from there.
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here's another reference i googled:
http://www.helpdesk.umd.edu/topics/trou ... 2000/4349/