@khoatran,

Hi, I have the same video card and have been trying to at the very minimum get a higher resolution than what I currently get (1024 x 728). You mentioned replacing your boot file with the one in the /root directory? Although MacOSX is based on unix, it does not have a separate /root partition as Unix/Linux, so can you point me where do i find root? I've also tried adding my device id to the two kexts you provided above but i does not give me the option to use text editor to edit the files. If i run:

nano -w ATIRadeonX2000.kext....nano shows a blank/new file? Any suggestions will be greatly appreciated.

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Gigabyte MA790X-UD4P
AMD Phenom(tm) II X4 940 Processor
MSI Radeon 4650
1TB Hitachi Sata
Windows 7 64
WD 250GB Sata
Hazard's Snow Leopard 10.6.4
WD 250GB Sata
Gentoo
Kernel 2.6.34