Please Help I'm using a power pc mac g4 667 mhz as a graphic designer running only a 17" lcd display i feel the need for another screen BUT! when attaching a crt monitor to the (HD-15) port next to lcd port on g4... my lcd screen is as normal but system prefs wont recognize the crt screen? all plugs fit perfectly? there is no option in system prefs/display so i'm stuck cant find any dual display patches for power pc towers though there is many for the ibooks .. please help!?