[KLUG Members] fixing bad mbr on WinXP with linux

[bill]

A friend has a non-booting WinXP computer.  It says the root partition
is unmountable.  He's asking me for a WinXP boot disk, which I can't
find laying around anywhere.

I do have a Knoppix and a Ubuntu CD.  So he could boot to Linux (yea!)  
Is there anything he could do with those to restore the master boot
record (MBR), which I assume is the problem?  He doesn't know if it's
fat32 or NTFS.

kind regards,

bill