WHAT !
You spent �180 on XP !
I am afraid he has wasted his money.
You could have got a whole new system unit for not much more than that, with XP already on it as well.
People who build PCs get XP at a much lower cost than if you buy the retail box (as I assume your dad did).
So buying a new system unit also gets you an inexpensive version of XP.
He could have bought the OEM version of XP Home for �64 from Amazon, see here
http://www.amazon.co.uk/Microsoft-OEM-Windows- Home-Service/dp/B000GWKNH2/sr=8-1/qid=11661931 12/ref=pd_ka_1/203-4223047-6358364?ie=UTF8&s=s oftware
Or the OEM version of XP Pro for �100 pounds, see here
http://www.amazon.co.uk/Microsoft-OEM-Windows- Professional-Service/dp/B000GWLTRU/sr=8-7/qid= 1166193112/ref=sr_1_7/203-4223047-6358364?ie=U TF8&s=software
Also, Microswoft are replacing Windows XP with Windows Vista in January so he would also have been much more sensible to wait to then and buy a Windows Vista or a PC with Vista on it already.
Oh dear, not good news all round.
If you show him this append he will probably cry.