There is hardcoded width on #container, on #content, on #header and probably on some other stuff as well. You are going to have to ferret out all of them until you get the look you want.
If you want to do much hacking to your theme, I’d get Firefox and install Web Developer, Firebug, and View Source Chart. And learn to use them.
Thanks, I have all that and use it on a reg. basis. I have went into the css changed evrything that deals with width ie; 960px and changed to 99% and so on. But after making nothing happened, so I tried taking out the background image, and the site expaned beyond the screen. Now the template I am using has a built in bg text editors and such. Could this be stoping me from customizing?
Obviously, whatever editing I can do is in Firebug which isn’t quite the same as a real css edit, but when I kill– I just flat out deleted– the width on #container and on #content the site expands to fill the screen. This doesn’t happen when you edit the site?