Small question regarding background in dreamweaver

Hey there everybody, I have a small question.

I’m building a flash site and i have a .jpg background that i would like underneath the flash file from the left side of the browser to the right side of it. Here is an example of what I mean.

Xerogravity

On the left and right side of the main movie are a couple of greyish lines. That’s the same thing I’m trying to achieve but I don’t know how to do this.
I’ve tryed putting my images in a “table” with the width set to 100% but that didn’t work either. I still had spaces between the coloums and spaces onthe left and right between the brouwser and the table. :h:

It’s probably a lame question but I seriously cannot find anything on the net explaining how to do this.

Thanks in advance.