Trying to update ghost boot disk

I've been trying to update our ghost boot disk with the network drivers for a Dell Latitude e6440. I've tried adding driver for bare, winPE with no luck. I finish the update in the wizard and create an ISO but when I boot up the E6440 and it loads Ghost I can't get an IP address. I've googled and found instructions on website but something is missing. I'm using Ghost 11.5.1.226 and the driver I'm trying to load is the Intel I217-LM.