We just updated the page in the FAQs with slightly better sample code:
<div align="center"><iframe align="center" src="http://my.shozam.com/examples/yellowstone/index.htm" name="shozam-gallery" originalAttribute="src" originalPath="http://my.shozam.com/examples/yellowstone/index.htm" name="shozam-gallery" originalAttribute="src" originalPath="http://my.shozam.com/examples/yellowstone/index.htm" name="shozam-gallery" width="100%" height="3000" scrolling="no" frameborder="0"></iframe></div>
Note the highlighted part which does away with the annoyance of additional scrollbars.
Full article here:
http://shozam.info/go/help/default.aspx?pageid=FAQs2
Example website:
http://www.angusadventures.com/photos/britain.html