I have just installed Leopard on an iMac intel 24-inch. I also have two older Macs (iBook G3 800 mHz; iMac G4 Flat Panel 800 mHz) which are below the minimum requirements (867 mHz) for installing Leopard. Installing using the DVD will not work. However, I've heard that Leopard can be installed using TDM and works just fine on such older Macs. Does anyone have any information about how to do this? Thanks.