Using E100ENT.KDF in the Target Designer.

Open the Target Designer. Select "Component Management" under 
the Tools menu. Select "Add" and choose E100ENT.KDF. Click "Open" 
and allow the Component Manager to process the KDF file. This 
allows the information in the KDF file to be integrated into the 
Target Designer database. Click ok to remove the Component Management 
Window. 

From your chosen Configuration under System\Network\Network Adapters
choose "Intel (R)GD82559ER Fast Ethernet Controller". After the green 
check mark appears next to the selection, right click on "Intel 
(R)GD82559ER Fast Ethernet Controller" and chose "Properties".
Select the correct Slot number for the "Target Machine". Finish selecting
features for your Configuration, Build and Install according to the 
instructions provided with the Target Designer.