This is a conspiracy against Silicon Image 3112 controller owners!
edit :: OK people, I edited the registry again and after 10 tries it finally worked. I can say for sure that I did a lot of comparing between what the miniPE had in it's registry for that driver and what was in the nonworking installation on the harddrive. After copying all of the configs from the miniPE to the HDD I also removed SiWinAcc.sys and it's service in the registry. Also I needed to merge the two reg files that are posted on the Bulgarian hardwarebg.com board from the thread that I gave a link in a post somewhere above. The last was crucial I believe.
I will answer any questions and try to do some tests if anyone needs it.
Regards.