I have a G4 (mirrored door/single 1,25 ghz PPC) with an ATI Radeon 9000 Pro video card (AGP). Currently I have a 22" LCD (Samsung) connected via the DVI slot using the supplied Apple DVI-VGA adapter. The other slot is an ADC. I would like to connect a 2nd 15in LCD w/ VGA. The ADC-VGA connectors are way too expansive. I also don't want to buy an Apple Color Display. If I purchase a 3rd party PCI VGA card (like the ATI RADEON 7000 MAC EDITION 32MB VGA PCI CARD 10660) will my 2 monitors work in DUAL DISPLAY EXTENDED (not mirrored) MODE?