Setting Ethernet port modes

I will be assembling machines with multiple network cards but I will =
need to be able to individually customize the mode of each Ethernet =
port. For example, one machine might have three Ethernet cards but eth0 =
is 100/full, eth1 is 100/half, and eth2 might be auto sense.

One solution that I have heard of uses three different network cards =
each with their own driver. Each driver is manually set which allows =
each port to be customized. However, I will be using standardized =
equipment and each network card will be identical and have the same =
driver. So this option will not work for me.

Can the kernel be tweaked to allow loading multiple copies of the same =
driver each pointed at a different port? Can each port be set manually =
to a different setting? Is there some hidden config file that does this =
of which I am not aware? Any ideas are welcome.

Thanks,

Brian