After creating a new Windows XP Virtual Machine, on VMWare Server, I noticed it had no network adapter.
It was an “unknown device” in Device Manager!
I installed VMWare tools, to no avail.
After painstaikingly thrashing about with my settings in VMWare Server, I took a look at my vmx file (located in the same directory as my virtual hard disks etc…)
It appears I had set the guest OS as Windows XP x64, when in actual fact, I had installed x32 version.
I changed this in my vmx file, and after reading this forum thread, deleted the following line:
ethernet0.virtualDev = "e1000"
Voila! It worked!