Hi All, Got this Mac powerbook G4 1Ggz CPU/RAM & running with OS 10.3.9, I have this problem: Unable to load Yahoo msgr with the latest edition. Ung nka installed po now ay old version pa ng YM w/c is wlaang VOICE chat n WEBCAM features.. Paano na po un? I want to upgrade my OS to 10.4, is it that expensive? Pls. help..Salamat po.