Hi, I have been given a 1.83GHz Mac mini (MA608LL/A), Intel Core Duo, 512MB of 667MHz DDR2 SDRAM (PC2-5300). Firstly I am looking to upgrade this machine to run with a 500GB hard drive and I would like to upgrade to use Lion so I can run photostream. I have heard that I need to upgrade my CPU to a C2D (Intel T7200 2.0GHz Core 2 Duo Processor), so therefore do I need to purchase the new hard drive to be compatible i.e 500GB APPLE MAC MINI Core 2 Duo 1.83 GHZ? Any advice please, will all this work and worth my while? Also If you can provide me any further details on what else to get will help greatly. Also any tips on how to get Lion working on this setup would be fantastic. Thanks again.