Hello, I'm wondering if it's possible for me to upgrade any of the parts on my Imac. I think it is the mid 2007 model ( aluminum frame with ATI mobility radeon 2600 hd ) and core 2 duo. I think the cpu is socketed so I can replace the processor. Is there anything else I can replace besides the HD? And what is the best processor to upgrade to availabe. Please do not tell me to buy a new computer as this will not be an option. I need all your feedback, thank you!