I had posted one here last Saturday about Red Hat and two NICs. Thanks
for all of the suggestions, but it seems the problem was not with the OS
as much as it was with the Intel Pro 100 NIC I was using. We've just
set up two different servers with Pro 100's, and encountered the same
problem (second ethernet card not recognized).
The solution is to install Linux with only one card -- the one that is
NOT the Intel. Linux will recognize it during the installation. After
the server is up and running, add the Intel Pro 100 and configure it
with Linuxconf. Both cards will then work just fine.