Run Knoppix as command line on the problem computer
I have done this on my boxes and for a friend about a week ago.
Boot Knoppix on the bad box, using knoppix 2 which forces command line.
enter sambastart as a single command and then establish a password for knoppix and mount all drives r/w.
For simplicity sake set your workgroup to WORKGROUP on the windows machines. This is easier than changing the samba configuration.
On a new XP machine, the default workgroup is MSHOME if my memory is correct.
You will find the drives available on KnoppixShare or some such from windows computers on the network.
Since you are reaching out, this avoids the firewall problems on the windows machines. Mine XP notebook is recalcitant on shares even coming in or attempting to, from an operating W2K system