instead of embedding the gallery in another page and attaching the second page in the iframe:
<iframe src="testp.php" width="100%" height="800px"></iframe>
attach the gallery page itself to the iFrame:
<iframe src="http://stagingthehouse.com/PowerGallery110/galleries/ribbon_fullsize/index.php?gallery=3&theme=dark" width="100%" height="800px"></iframe>