I am trying to take an image of a new computer model we are going to be
using in our system. When I pxe-boot and select option 1 (Start
Maintenance Mode ZEN Imaging) at the menu, I get an error message that
says: "Unable to detect network card. Check documentation for list of
support cards."

I couldn't actually find where this list is, but I did find instructions
on adding linux drivers to PXE, however I am having a tough time finding
the drivers on Marvell's site. Device Manager reports the NIC as a
Marvell Yukon 88E8052 PCI-E ASF Gigabit Ethernet Controller, does anyone
know where I can find drivers for this? Is there anything else I should