My HD4650 is working fine with monitor connected through VGA, when using AsereBLN Bootloader with GraphicsEnabler=y flag as inject (using booter by JaS will give you DVI instead of VGA), 10.6.2 Framebuffer kexts (need to be put back, after 10.6.3 Update) & the Device ID beeing added to the two kexts you've already named yourself.

You can use this tool to check wether QE, OpenGL & Co is fully supported or not: http://osx86.net/f36/video-hardware-...ard-and-t5859/

If not it might be a wrong inject in your case, as it is beeing shown as 4890 in System-Profiler...
No offense but I think you've selected far too much crap that ain't necessary for your system, from the distro's customization - for example; why using BlackNight XNU on Vanilla capable E6300 CPU?! (This Kernel has been made for correct FSB detection on AMD Phenom and "Shanghai" Opertons) This is like fixing what ain't broken.

I'd recommend you to do an as clean a possible reinstall using just minimal patches you are completely sure, that you a) need them to boot properly for the first time & b) know what changes they are doing to the system.
After that I'd start to add support for your GFX and other components step by step manually...

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