Now right there is a damn handy piece of information...I have tried HDMI several times in my experiments but always as an after thought. I have tested using DVI+VGA and DVI (+vga adapter) + VGA. I do not have a pure HDMI display, all testing with HDMI that I have done uses a HDMI to DVI adapter.

You seem quite knowledgeable, unfortunately I see you have the 512 version of the 4650. In all the works I have done on the other site I had multiple reports of working 512s but anyone with a 1Gb was unable to replicate the success.

You tell me, what combos do I need to get 2 working displays (not just mirrored but spanning)?