I just saw rcook's post and wanted to add a few thoughts.

When I did the above my workgroup wasn't named WORKGROUP. It was my normal workgroup name. Not sure if his WORKGROUP issue is because of XP, some particular XP service pack issue, or because he's going in the opposite direction that I was (running from the XP console when I ran from the Samba console). I plan to do a little more playing with this and see if I could move files from the windows system side without using the WORKGROUP name and will post back later.

rcook also avoided starting the GUI and ran Samba from the command prompt. I'm not clear why.

He made the file transfers from the Windows side. That might be a good idea, as a user doing this is likely more comfortable with the windows tools and GUI than with Knoppix. Does Samba mount all of the Knoppix system's partitions for you when you do this?