Its sound like its possible, have you enabled remote network sharing on your Macbook Pro? If not you can do this via going into System Preferences and enabling it from there. Another easy way of doing this is by installing iTunes on you Windows Vista Media Center PC, and using iTunes to remotely share you music and movie across a wireless network. Me and a couple of friends I know use this method when we want to share some music.
- Remember to enable sharing in the iTunes preferences, also make sure that your Windows Vista Media Center PC is not behind an obtrusive firewall which could be preventing your Macbook Pro from connecting with your PC.