Sadly, she said no to the toilet option
(no, I didn't ask her, but now we know why Richard is so quick in answering posts

)
- WiFi is not an option in this property due to the thickness of walls - number of floors etc + they've re-wired everything from top to bottom anyway.
- I did consider Linux for a nanosecond, but no, don't want to complicate things - it probably would be my preferred option for reliability though and cost
- There should be an existing NIC in the current machine, and the new one they will order (Dell I'm afraid) will have an on-board socket - not sure what make switch/modem we'll go for, prolly Netgear.
Thanks for alll your comments - was particularly interetsed to hear there are no hidden pitfalls in installing XP Pro on a server and save a few £££.
Cheers
Charles