I have tried that and I get an error message saying
init_module: Device or resource busy
I even tried forcing it with insmod -f, but got the same results.
linksys is mentioned as being linux friendly in the hardware howto.
When I run cat /proc/pci | grep Ethernet, I get a line stating
'Unknown vendor Unknown device (rev 17)'
I am using kernel 2.2.14, but the tulip module is listed in /lib/modules from the install.