So here is the script we used:
http://dynamicdrive.com/dynamicindex17/iframessi2.htm

But the problem is that it's not allowing page to automatically adjust in it's height.

The home page looks fine:
www.longdrivers.com/forum.php

But click on the General Discussion -->Long Drivers of America Discussion Forum Guidelines.

The page doesn't fully extend to the correct height and hides the bottom of the page (right now I have set the iframe to scrolling="yes" so that the client would stop yellling at me to make it work but normally it just stops about 80% of the way down)

Yes, I know FF ROCKS but the majority of users out there still use IE and my client uses IE so I just need to find a way to fix this so that it will work.

Any help is greatly appreciated!