[Zope] URL redirection.

Hi, OK, part of my zope pages are inserted from another site (like frames, but without frames). What must make my product is taking these external pages, treating the HTML code and print it with some new features. When the user clicks a link of this inserted page, I want to intercept the request, treat the URL to go and searsh the HTML code to insert it in my page. Is it possible to do it??? How??? Thank you for your attention. Pierre. P.S.: If you speak french, please do it in your answer!