Not a problem nesnfsn,
Perhaps it can merit it's own post in a more appropriate category here on the forums. If you want to cover all your bases, other osx86 forums as well heh. Feel free to link us here as well.
Anyways, If you haven't tried using GraphicsEnabler, then that's all you probably have to do to get it working. 6850's are well supported, and it is likely that Cham has that same DeviceID covered. It's only when it's defaulting to something your hardware doesn't think is right that you can try other framebuffers, along with those other boot up flags that I'm not too familiar with =P. And yes, you can simply enter that exactly as a bootup option to try it first: GraphicsEnabler=Yes
It will take precedence over anything you have set in the boot.plist. So give just that a try and see if it gives you all the right ports (working of course), then if that doesn't work, then you can look more into framebuffers and what not =).