Go to this link and you will see what I am talking about: http://austin.craigslist.org/sks/731501880.html
Just use any html editing program if you can't remember the html code. Dreamweaver etc will allow you to do it and then just view and copy the html code.
I really hate sounding like I am totally clueless (even though I am) but what is html and how can I use it to put the ad on craigslist? I have no idea as to how to write code, so where could I go to get some guidance as to how this is done, or get some help.?