network card

I have a UnixWare 2 server that has an ISA 3Com NIC that has just a BNC connector on it. I want to remove this and install an ISA 3Com NIC that has a BNC/RJ45 connector. What steps do I have to go through to successfully complete this? Thye are almost the exact same cards except for the connectors.

You might just be able to swap the cards without any changes to the kernel. This is true is the model number of the cards are the same or if the basic chipsets are the same.