1) Open Macromedia Dreamweaver MX and open a new CSS document
2) Click the Design Panel it looks like this:
and click "New CSS Style" button which looks like:
3) A menu which looks like this will appear, enter the name of wat you want to call your css style:
4) Click enter and the next menu will come up and you can start entering what you want for your style, you can choose font styles you have made on DW or that are already there like in this picture:
In this "Type" Section you can configure everything to do with the text without having to know any of the text-decoration codes, this saves an awful lot of time learning them, unfortunatly some of these don't work in FireFox yet. After configuring the type i got: