Hi,
Once your driver is compiled, test it by inserting it with insmod:
to install your driver "permanently" (in fact at the rigth place), copy it into /lib/modules/2.4.2?/kernel/drivers/net/, then you can do modprobe on it... And to be sure that your driver works correctly: when it's inserted, try:
and if you see a correct output, it means that your driver works
Oliv'