Ok Im not sure the "Exact" kext that was causing the problem because i went in and took out all the NV navida ones and all the ati ones that had nothing to do with my 4850 and the geforce drivers and OMG it booted. Im going to redo my install i think i messed something up in the install but to load and not be in safeboot was a godsend. I now see hope. hay BTW what sound kext did you use. becuase i had no sound. Thanks for your help.

I guess there's even a better way to boot with HD4850 without removing other kexts, but anyway I'm glad you finally got it working
Get sound kext here : VoodooHDA. I tried patching DSDT and modifying original AppleHDA, but it doesn't work - It only shows HDA device in System Profiler, but no outputs/inputs. VoodooHDA isn't as good as AppleHDA, but it works, even pretty well.
And if you need kext for Realtek 8111D, it's that one : R1000SL

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Gone Linux.

OH Btw i found out what kext it was. it was the ati radeon 2000 that was doing it. of all things. lol i found another post on the subject so i removed just that and problem resolved