I've searched a bit and not found too much informtation on this. I have an Early 2006 OR Mid 2006 (Can't Remember) Intel Core Duo iMac With an NDVIA x1600 256mb graphics card and am wondering if this model comes with Extended Desktop / Screen Spanning capabilites, or will I have to enable it in Open Firmware? I've seen the 'Screen Spanning Doctor', but haven't found any information on my particular model. Also, what are the risks of using the Screen Spanning Doctor if I find I need to use it to enable this and does it void your Apple Care Plan? Thanks.