WinPE and networking

Our organisation does not require the more complicated deployment strategies
and tools, so am trying to keep it simple. Am using the Windows AIK to
create a PE boot CD then an ImageX image of a reference PC I have setup. My
problem is the WinPE_x86 boot CD boots up fine, I can create the image fine,
but WPEINITis not loading the network. The net Use command produces an error
"System error 53 has occured. The network path was not found" and Ipconfig
/all shows no networking is loaded.

My guess is the NIC drivers, but I cannot be certain.

Can someone point me in the direction of information on how to add the NIC
drivers to the WinPE boot CD image. The Win AIK docs say nothing about this
issue.

Cheers