Hi, First of I'm not that knowledgeable about the technical side of Macs and I need some advice. I have a: PowerBook G4 1.67GHz, 1GB DDR SDRAM And I was wondering if I can upgrade to Leopard? What are the advantages and disadvantages of putting Leopard on a PowerBook? I was going to wait until I got a MacBook Pro (early next year), but after seeing all the features - I want it! Thanks for any help and information, much appreciated.