I purchased a macbook 2006 core duo for $350 from a dude off of craigslist. He installed snow leopard on it. I wanted to reinstall the OS using the restore disc that came with it but it's version 10.4 i think. And the installer always says this software can't be installed or something. I already know about the downgrade issue. IS THERE ANYWAY I CAN USE THE RESTORE DISC? do i wipe the hd then use the disc or what?? please someone help. because i want to run on a secure computer or what's called a fresh install.