Force Frame System for PunBB Forum

Greetings. I want to a Forced Frame system for all my PunBB forum pages. If someone directly loads or clicks any forum page link in the browser, it should detect that it is not within the required site frame and it should open the same page inside the specified frame in the master frames page. But most importantly for Google, Yahoo, MSN Live, Ask etc. Search Bots, it should not force the pages to open inside the frame (this script should be off) so that they can spider the page text. I want an option to be able to add more such Search bots to this list in the script whenever I want later which can spider the page directly without this forced frame option. My master frame page has 3 frames, left, top and the main frame where the forum pages will load. Thank you.