I have a problem I have a Macbook Pro from 2007 that came with OS X 10.4 Tiger. After Leopard came out I upgraded, and now I want to reformat it all to get a clean install. Therefore I chucked in a Leopard DVD that I had laying around, and started to install. It said that install failed and that I had to format my drive with Disk Utility from the DVD. So I did that. After that I got an error just stating that it could not install because apparently the DVD I had was a upgrade DVD, and since I formatted my harddrive I didn't have Tiger on it anymore. Therefore I am now stuck with an empty harddrive and a DVD that won't install OS X for me. Therefore I thought I'd go for the Tiger DVD - which I of course couldn't find... Or rather the Tiger DVD I have seems to be from another Mac because it says "This software cannot be installed on this computer". What do I do now? I have 3 sets of Tiger DVD's, 2 sets of Leopard DVD's, but none of those will install on my Mac. Any ideas?