First you will need to identify what type of NIC is present in the client. Then go to Dell's website and download the driver to your Ghost server machine. Extract the driver using WinRar or WinZip into an empty folder and then use this kb document to import the driver:
Title: 'How to add drivers to DeployAnywhere or WinPE.'
Document ID: 2008050916132860
> Web URL:
http://service1.symantec.com/SUPPORT/on-technology.nsf/docid/2008050916132860?Open&seg=ent
If you are using the console and select to copy one of the default WinPE wims, effectively creating your own wim file, make sure to go into the console and change the virtual partition the client is using.