Stretch stage only when necessary

I put together this little photo gallery tonight, and overall, I’m content with how it works, but there’s one thing that bothers me - unless you have a super big monitor, the scroll bar is always at the side of the screen.

Is there a way to keep the stage relatively small (550px or so) until a vertical picture comes up, and then stretch the swf to say 800px? I’ve used full screen Flash before, but when I do that, instead of forcing the scroll bar to appear, it just cuts off the image.

Note: Yes, this problem could be solved simply by not doing it in Flash, but eventually I plan to append this to a portfolio of sorts (which will be in Flash) and don’t want to make it an external link.

Thanks.