I can confirm working on a GTS 450 with GraphicsEnabler.
Although the screen turns blue on resolution change, but after forced restart it sets itself to what resolution you set it.

BTW, is there any way to tell if there's an update to this driver?

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My Specs
System: Custom Built
Mobo: ASRock Z68 Extreme4 Gen3
OS:Mac OS X MountainLion 10.8.2 & Windows 7 Ultimate x64
CPU: Intel Core i7 2600k @ 4.2GHz
Memory: 16GB DDR3 XMS3 1600MHz
Graphics Card: AMD Radeon HD 6870 1GB

Email/Gtalk:
[email protected]