no, you don't have to be a programmer to do it the css way, but you should at least know a bit about css. Anyway, with Firebug and your own css (and lots of coffee) you should also be able to get this work with try and error. Most work will be creating your own icon set because there are more than 200 of them. With luck you'll find some free sets out there which you can adjust for your own usage. Be aware, this is lots of work and if you don't want to do this by yourself and you're in urgent need of your own theme, there are some people here - including Intermesh and my humble self - who can do this for money.