Connected to the HDA using VNC on the USB NIC. Then used System->Network Device Control. I think you can get there using system-config-network& from the terminal but I'm not sure. Anyway this brought up the NICs. It showed the USB one as active and the onboard one as inactive. I edited the onboard and enabled it using a Marvell 88E8071 PCI-E driver. It worked. Then I wrote down the MAC addresses of both so I could recognize them later. Next I found the scripts that governed these cards. Went to /etc/sysconfig/network-scripts.
I edited ifcfg-eth0 to be the MAC address of the onbaord card instead of the MAC for the USB attached NIC. I then rebooted and it didn't work.
Internet to the rescue! I found some instructions about the 70-persistent-net.rules. So I took the drive out of the server and attached it to a linux PC. I then opened up the 70-persisten-net.rules file that I found in /etc/udev/rules.d/ I just deleted the line that referenced the USB NIC which was still here and labelled eth0. There was a later line with the correct drivers and such for the onboard nic. So I edited that line to be "eth0" but kept everything else the same since it was using the correct drivers. Now I put it back in and it works!
So I activated to get the correct drivers, then edited /etc/sysconfig/network-scripts/ifcfg-eth0 and /etc/udev/rules.d/70-persistent-net.rules and it appears to be working. Thank you for all the help and patience!