I have a Dell Dimension 2400 with Pentium 4 2.66 GHz, 1 GB, 120 GB HDD. I want to upgrade it using AMD Phenom II processor and a Gigabyte Mobo, 4GB RAM and Corsair 400 Watt PSU. I was wondering if anyone has tried such an upgrade and any steps/tips/dos and don’ts they have for such an upgrade. Please advise.