Hi,
Quite interesting what you developer says There is no such thing in Wordpress as Impossible, but let's say if there is no other way to handle it, you could download the Yoast plugin (wordpress seo) and set those pages to noindex, follow and from robots.txt disallow access to the two pages.
Still I would check what is causing the "auto-generated" pages. If it is a bought theme, go ask the original developer. I'm quite sure that there will be an easy way to fix it. (drop me a private message and we can check it out together)
Gr., Keszi
Later Edit: Hint: Maybe you (or your developer) should check into the custom post types.