Change font in Windows Shell

Does anybody know how to change the font in the windows shell? I wan't to make things look different(like the start button, window names, ect..).

This would be done through display properties. Right click on desktop and select properties, click on the appearance tab, then select the advanced button. This will let you change the fonts for various things, however the start button cannot be changed like this.

You can go to use skinning applications, but I think its usually best to stay away from them as some come with spyware and others just cause other problems and hog resources.