Soldering iron and solder wire is all you need. Simply hold the wire on the part you are soldering, put the soldering iron on it, it will imediatly turn to liquid, and when it hits the object, it will turn straight to a solid again, unless you are holding the soldering iron there. Remember to be careful!
http://www.altecweb.com/home.asp?cat...oldering+Irons
If you aren't 100% sure what you are doing, you should take it to a computer shop.