Dreamweaver Difficulties!

Example:
<style type="text/css">
<!--
.ban {
position: absolute;
left: 0px;
top: 0px;
right: 0px;
z-index: 2;
-->
<div class="ban"><img src="Banner.jpg" width="100%" height="200"/></div>

Edit: I guess I should clarify. You need to specify what kind of positioning you want, either absolute, relative, fixed, or static. I prefer Absolute because you tell the image exactly where to go. Relative puts it wherever it wants and then you adjust it from there. It's kind of a pain. You also need to specify your Z-index or your objects won't appear how you want them to if you have them occupying a similar space. The program isn't really junk because you have the same problem if you just use Notepad.

If you know how to write HTML correctly you won't have to deal with the z-index property. Also, if you know how to use CSS correctly you would be able to use relative and absolute positioning without running into troubles. All you need to do is set the parent element to position:relative and any child element to position:absolute and that will make all child elements position relative to the coordinate plane of the parent element.

Can i do this with flash?

If you aren't getting the hang of Dreamweaver, I wouldn't suggest going to Flash.

You can't do what I said in Flash, but the same thing can be accomplished. Flash and Dreamweaver are different programs, but they have a few similarities. After you place all of your objects in Flash, you will start using actionscript to tell each object that you want to do something, what it needs to do. There is a menu that you can pick the actionscript and it puts it in automatically.