I attempted to install Leopard (build 9A581)on my 800MHz iBook G4 1.12GB RAM using Leopard Installer to give a default 933MHz speed but without success. I don't actually have a physical DVD, Leopard is in my Downloads folder and on my desktop. The installer starts without problems, I prompted to restart in order to start the installation but when the ibook restarts its with Panther. I have also tried setting Leopard as the start up disk in system preferences but on the restart prompt, it wont restart. I also tried to boot Leopard from an external hard drive again without success. Any help would be GREATLY appreciated. Thanks!