Why it may be Needed
This is required when drivers are needed that are not already bundled into the WinPE build.
Common Symptom:
The most common manifestation of a missing driver is the inability to boot to WinPE with the error: "Restarting DHCP client service retry 1..." which will repeat 19 times before giving up and booting without network support. This generally indicates that a driver required for the NIC in the system booting to WinPE is missing, and can't bind correctly to the card, thus can't send a valid DHCP request.
Procedure can be found here
