Dell Precision M6400 CPU Replacement

Hi All, I just purchased this laptop and I'm thinking of doing several upgrades to take it to its potential. One of these upgrades is to replace the 2.80ghz with the 3.06ghz which I think is the highest one I can put in this machine. If I'm lucky I'm actually hoping to score a quad instead of a duo processor. The laptop came with two 2G ram sticks which I am changing. I've already ordered two 4G sticks and plan to order another two as soon as I can.

Can anyone tell me if there are any other changes I need to make to to allow the laptop to use this cpu? Will the original fans work or do I also need to change them, or anything else?

Thanks