On my current attempt at a HTPC, i have a
NETGEAR FA311/312 PCI Adapter
ps I am currently looking in to bootable PXE solutions such as etherboot. Will post how that goes.
Looks to me like you FA311/312 does not support PXE boot without the addition of a Boot ROM. See below for a possible supplier of these;http://www.argontechnology.com/products.aspx?id=46
However it might be easier and less costly (thats just a guess on the cost front) to just buy a new NIC with PXE boot support on-board.