WordPress Subpages Fancybox Trouble

So, if I understand your question correctly, your problem is that your iframes are showing the theme (nav menu, sidebar, etc.) and you don’t want them to.

If that’s the case, I’d recommend creating a new Page Template that is styled after your bio iframe (no menus, no sidebar).

There’s more info on creating custom page templates here:
http://codex.wordpress.org/Pages#Page_Templates