When it goes to black screen, can you press CTL+ALT+F1 to get to a terminal?
If not, I would suspect a phantom port issue like the 5200's have or the HDMI adapter may be confusing things.
Just speculation, but I wonder if the 6600 has phantom port issues as well? I can't really tell without seeing the logs.
Things I would try if possible:
boot: live video=TV-1:d
Should at least boot to command line unless the adapter is causing problems.
boot: live 1 nosplash video=ofonly nouveau.modeset=0
2. Another display with DVI. (To rule out the adapter.)
3. Swap port it is plugged in to.
Also, I've never seen the 1. 1. 1. you described from CLI install so I may be way off base. Since you are dual booting, I presume the firmware is the latest?