knoppix

Gahh. Windows fucked up. I can't boot it any more (some system32\config\system.log-or-something-files seem to be corrupt). I tried the repair-function with several windowsXP-CDs (to make sure the problem doesn't lie within the CD) and neither worked.

well, since windows reinstallation doesn't work either (same error as with the repair-function), formatting C seems the only way.
I booted from a knoppix CD to backup some files from C before i can format it (C and D are two partitions on one HD, E is on another HD).
problem is, that's my first time using knoppix and apparently I'm to stupid to figure out why I can't access my harddrives
to delete some files from E (need some free space...) and to copy the important ones from C to E.
any help to access rights to delete files/ mount the harddrives properly and how to format
C from knoppix would be greatly appreciated.
alternatively, if you know another solution to fix windows without losing files on C, tell me.

some additional info:
I'm not able to enter safe mode or anything similar.(thus I can't just enter format: C:\ and copy or delete files...)
I'm able to enter BIOS, obviously.

thanks in advance.

OP again. just got an error message while trying to download an image. it says

Couldn't mount device '/dev/hdb1' : the Operation is not supported
Windows did not shut down properly. Try to mount volume in windows, shut down and try again.
Mount failed.

(may be not the actual mesage, I had to translate some parts)
meh seems I'm fucked huh?

just realized that there is a Computer board, too. damn. well just delete it then, mods.