All you need is a Park Tool BBT-2 or 22, or a copy of that. And a 10mm hex key for the crank arm bolts. For the cartridge itself, go for the slightly more expensive BB-ES25, it's just a few $ more.
Edit, if you haven't looked it up, here's the procedure with illustrations
http://www.parktool.com/repair/readhowto.asp?id=94