alright it was a bit tricky for me at first too
now im sure you already did this but might as well post it anyways. on your pc you need to go to network and sharing center (what vista calls it) and turn on the media sharing setting. then you go into that and get to allow/deny whatever you pc pickups on your network. your ps3 will show up as an unknown device. how i found out which one was i went to the ps3 internet status to get its mac address and clicked on the unknown devices properties (lets see see the mac addresses) and when i found the right one allowed it, and of course apply/save settings.
/shrug if that doesnt do it then you have some blocked ports or your firewall settings are effin it up












