Hello! I am getting left behind (non-supported OS). I am running OS 10.3.9 and 90% of the time it's just fine. But to use google earth or once in a while, a browser with updated Flash, I need to use 10.5. I would like to boot to 10.5 (on a separate HD). Am I able to do this with my machine? Suggestions, comments? Thanks, jonny ///