system
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Since Knoppix is read only to the file system you may want to use BartPE.
http://en.softonic.com/s/bartpe-windows-xp
YouTube How-To: http://www.youtube.com/watch?v=wwpy55mb-nk
Here is how to run System Restore from BartPE
http://www.ehow.com/how_6158243_run-system-restore-bartpe.html
Another good recovery CD is UBCD: http://www.ubcd4win.com/
Also, for gurus on O/S & Recovery side of world there is a lot of Forums but here is ElderGeek…good guys there.
http://www.theeldergeek.com/forum/index.php?s=29593ad23c269c5a992118c426f6cc1c&showforum=2