I installed Lion (Developer Build) on my second machine shortly after it's release. I wanted to see how iOS was being implemented with Apple's traditional thinking of the Desktop. I now wish to downgrade Lion and reinstall Snow Leopard. All the files on the second machine running Lion are backed up (not using Time Machine). However when I attempt to boot from the Snow Leopard installation disc and complete an erase and install, the machine hangs indefinitely. Nor can I restore from the desktop it seems. How can I downgrade back to Snow Leopard? Thanks, John Note: I am a registered Apple developer.