I really need your help here. How do I create a nice dropdown menu (which I'd like to customize to match the colors in my layout) in which every links open in a popup window ?

I have a few problems with popup windows :\

Thank you for your help ! :)

Just use a regular drop down code (http://www.lissaexplains.com/fun.shtml) and have the option values be javascript:popup() to open the popup windows.