same at my uni in england...all p2p is "disabled" (there are ways around the fire walls they have set up...speek to some techies at ur college if they can help).
I use a program called sharescan2 to search the university network...ie all the files that are being shared by ur college friends. works quite well although can chew up resources on older machines and crashes ME and 98 a lot...dunno about 2000 but XP copes fine...
did a quick google and found this site
http://tucows.wooow.it/preview/220820.html
dunno if it works but try it...its cool. u just need to set up some ip addresses...again ask the techies... or tilted computers!