5
One way to do this is
1/ rename the photo album in the modules page
2/ use a module like multimenu to create your own menu block. You can make links in this that open in a new page outside your site and links to pages within your site. Its all very configurable.
Regarding the iframe code, putting this in a custom block
<div align='center'>
<IFRAME align=center width=100% height=600 scrolling="auto" src="http://www.yoursite.com" ></IFRAME>
</div>
Calling the page with the custom block will automatically load the external page.
Richard