With the lsmod from the HD is the reiserfs all that appears? That certainly seems strange if it is there should be more modules loaded. Here is another part that is wrong when you modprobe it is looking in the wrong place for the modules.
root@xwekbal01:~# modprobe sis900
modprobe: Can't open dependencies file /lib/modules/2.4.20-4GB/modules.dep (No such file or directory)
Have you installed a different kernel it should be looking in /lib/modules/2.4.20-xfs/modules.dep which is the kernel that knoppix uses which version are you running? From the HD what does the output of uname -a tell you mine for example:
Code:
[11:50 PM Wed Jul 09: stephen @ ~]
>$ uname -a
Linux HappyTux 2.4.20-xfs #1 SMP Mit Mär 26 15:37:36 CET 2003 i686 GNU/Linux
Yours should be the same except for the HappyTux which is my machine's name it should be what you choose for yours. Something else you can post is the output of dmesg (the boot messages) from a console. Just use dmesg > dmesg.txt which will output the messages to a file dmesg.txt in the current directory which you can put on a floppy to post from your other install.

Something you may want to try when you get to the LILO boot screen type in linux noapic I've seen a few post where the network card is not detected without the noapic but unless the looking for the modules in the wrong spot is solved I doubt if it will work still there's no harm trying anyway.