Hey, just wanted to toss some major kudos your way. Lion has never worked better for me than it does now, albeit with a few minor issues. That said I do have a few questions.
My system config is as follows:
4 GB RAM (G-Skill)
Sapphire Radeon 5750 (NOT the Vapor-X) 1024MB
I was using ####### setup, but it was not designed for this mobo. Your method worked like a champ by comparison, save for the usual lack of HDMI audio from the Radeon card. I also had trouble with AppleHDA if I made even the slightest change to the system.
When I switched to Lionize everything seemed to work fine EXCEPT:
1. Backpanel audio is present and working. However front panel HD Audio is nonfunctional and no longer listed.
2. I installed with the 10.7.2 App Store Download. The system will only boot if GenerateCStates, GeneratePStates and EhternetBuiltIn are present in o.c.B.p. Not crucial, per se, just more of a curiosity than anything.
3. HDMI Audio is a necessity, but I'm willing to do that work myself. As long as HDEF is present in the DSDT I should be fine.
EDIT: Oh, and it reversed the scroll wheel on my Logitech Wireless Mouse.
If it helps, I've attached my IOREG and Boot.plist. Many thanks in advance for any help provided.