>Installing the VMware Tools resolved some other issues by enabling the USB mouse, and improving the video, but I can't figure out how to get XP64 to load Ethernet drivers.
>Attempting to install the drivers from the install cd fails because the Hardware Update Wizard "cannot find the necessary software."
Do you mean the Windows XP x64 CD? The correct virtual network drivers are in the VMware Tools which you have already installed. Have you chosen the 'Complete' installation option v. 'Typical'?
Please post all of the lines that match "ethernet.*" from your VM's .vmx file.