www.parktool.com
Read up before you do anything. Grease every thread you touch. Use a huge adjustable wrench for leverage to get that crank puller in all the way before you pull the crank (lest you strip it). ~35 foot pounds is a rough standard for crank torque when you're installing them. If you don't have a torque wrench and you've never installed a crank before you may want to just pay someone to do it so things don't go ... poorly. Good luck though, a search in the mechanics forum will likely give you another "first-timers" set of instructions for replacing a crankset.
- eyefloater