I've been reading the guides throughly and I just want to be confident before installing everything and flashing so if someone can just confirm what I'm doing is correct, I'll feel better about this whole process!!! Thank you! I have a 1st Gen mac pro running Snow Leopard 10.6.3 - First I'll shut my computer off. - Unplug the monitors - Remove the 7300 GT and put it in to slot 4 - Add the XFX card in to slot 1 and use the extra super drive power while using a split molex to connect 2 of the power cables that come with the graphic card - Connect 1 monitor in the slot for (7300 GT) - boot up, and run Zeus on OSX (Select ATI tab, Select 4800 series, Select Snow Leopard ,Browse for the ROM with [groths.se/atiflashingtool/ROMS.zip] and select the XFX ZWFL & ZWFC rom, Click Flash) -power down -unplug the monitor cable from slot 4 (7300 GT) -plug both monitors into the 4870 Good to go? Looking forward to your help!