I'm looking for advice on how to (finally) get wireless internet on my powerbook g4. When I bought it in 2005 the wireless worked poorly. The Genius Bar guys told me that nothing was wrong so I just used an ethernet throughout college. But now I'm done with college and needed my wireless to work better. So I brought it back to the Genius Bar and they told me my wireless card wasn't working properly. They won't replace is because I'm out of warranty (which is frustrating because they didn't diagnose it 5 years ago, but that's not the point). I replaced the wireless card using one from a friend's old Powerbook (same generation and size, 12"). But now the internet just doesn't work at all. IS THERE A PRODUCT I CAN BUY TO PUT IN THE MACHINE OR IN THE USB PORT TO ENABLE WIRELESS CONNECTION? Thanks.