Hi Jomy,
Further checking, IPXE is an open source project which we do not support.However here are some suggestion you might want to try:
1) Try use LANCONF to write to the expansion ROM, however in case it does not work, we do not have sources to further support
2) Try use the i210 adapter to boot and chainload IPXE, here is a website for your reference:
http://ipxe.org/howto/chainloading
thanks
wb