I would suggest learning some html and using notepad and then doing your finishing touches in dreamweaver. What you are talking about is a thing called a splash page. This is a very simple coding job. All you need to do is make a table in the center of the page and that is where all the text about it will go and then you go and make a graphic for the background.
I used to own this site:
http://www.300aweek.com
Get some ideas from that.
Tom Swanson