It will run Vanilla Snow Leopard Fine (If there is no SATA errors), but you may have to find more specific drivers for your ATI and WLAN cards.

As for the Kernel P, could you please boot with -v and take a picture of the text that appears and upload it here? It will help find us find a more specific solution to your problem.

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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]