After going through pages of posts on this topic previously, I decided to start this new topic for ONLY SNOW LEOPARD INSTALLATION ON GMA 4500MHD laptops. I know it is not possible for now to have kexts supporting gma4500 graphics ..... that too on Snow Leopard Installation. Some hacked gma3100 kexts available for OSX 10.5 systems but nothing for 10.6.