Network booting to Ghost server

Ok, here's my issue.  We just got an Acer W500 tablet PC running Win7 proffesional.  I did a network PXE boot to our Ghost server.  I need to load the NIC driver in the DOS window.  This tablet sits in a keyboar/dock that has an Asix AX88772B network adaptor in it and connects to the Tablet via USB.  I have downloaded drivers from Acer and Asix and cannot get them to load once I boot to the Ghost server.  Does anyone know of a driver I can use for this, or maybe a different solution?

 

Thanks,

Nate