Burning out need HELP!! Pulling a nonvb PHP script into external page OS-Commerce

[Scalemotorcars]

HELP!!!!! My brain is starting to fry.......

OK I figured out how to make a Non-Vb page from digging around. I figured out how to pull in the header, navbar and footer. I even figured out how to pull in basic HTML into the body area. Check it out....

http://www.scalemotorcars.com/forum/externaltest3.php

So for right now the body area is an Iframe. That basically is a hokey way to go about things so I need an experts advice.

I want to pull the OS-Commerce php index script into the page and fuse the two together without the use of the I-frame. All links would have to rotate in that page so I don't have to do the same for all the Cart files. Heres where the I-frame works so perfectly but it looks horrible and I'm concerned about browser compatibility and future support for it.

Heres the link to the stand alone OS-C php script. http://www.scalemotorcars.com/catalo...aintenance.php its closed until I can figure this out or until someone here has mercy on me. Thanks in advance....