i think that the 8139.c will also work
http://www.scyld.com/network/rtl8139.html#8139too
you should be able to find a it listed when you type:
]b]cd /lib/modules/2.4.18-18.7.x/kernel/drivers/net[/b] (substituting the correct numbers for whatever kernel version you are using; you can get your kernel version by typing:
uname -r)
modprobe 8139.c (or something like that should load your module)
lsmod to confirm your loaded your module