@firej8 RAID is definitely an issue. Search the forums for ‘raid’ and you will find some suggestions on how to make this work. But focusing on the network/PXE boot for now is a good idea!
As I found out here there seems to be an “Embedded Dual NC371i Multifunction Gigabit Network Adapter” in that server. But I cannot find out what exact ethernet chip that is. Some say it’s a broadcom chip but I find different hints as well. Please boot a linux system (possibly live linux DVD) on that server, run lspci -nn | grep net
and post the full text or a picture of the output here.