not sure what files are actually saved the first time LTSP is run but if you can figure this out, you can use your floppyconfig to restore the LTSP configuration files and then run:

/etc/init.d/knopppix-terminalserver start

all from the knoppix.sh file on your floppyconfig

Try looking for a directory called pxelinux.cfg and the file in that directory called "default". There's probably some DHCP3, nfs, and tftp configuration files too. You should be able to boot from CD and start LTSP and then look for changed/new files in /etc directories.