HI, I just got my macbook pro 2 days ago. i have installed windows xp on mac using bootvcamp. I know nothing about network connections. I just want to know how can i share files between mac and my desktop pc, windows on mac with desktop, or windows on mac with desktop pc wirelessly. right now i have a linksys wrt54G router and an airport express. i am on internet with cable and linky router. what can i do to get those thing done?