OK, for the record, I went with a 32 Gb partition, as that is what the Boot Camp assistant suggested...but that was as far as I got. When I managed to boot into the Windows installer, my keyboard was unresponsive, so I can't do the install.
This chap had the same issue.....
http://www.askdavetaylor.com/install_windows_xp_in_boot_camp_on_macbook_pro.html
To me it sounds like not only must you have SP2, but a fairly newish version of the whole Windows install? My idea of using a PC keyboard seems to not be a solution, as this chap implies.
iroiro, can I take you up on that offer and borrow your install CD if you're around on campus?
Cheers, Phil