Hello, i have an iMac G5 17" 1.8 GHz PowerPc G5 processor with version tiger 10.4.11. I would like to upgrade to Intel core 2 duo without buying a new iMac so i could get leopard 10.5.1 but really don't have a clue how too. Could anyone help me out please ? It would be much appreciated. My email address is {removed to protect poster from spam}. Thank you for reading.