search engine listings from php pages

Forgive me if I have this wrong, but I think a couple of weeks ago, Rasmus recommended making a special page for search engines to spider with every possible result from a db query, then to send the search engine spider off to pick up all the links, and hey presto your entire stock is listed! I've read the altavista pages about this, and they imply they have a problem with urls that contain ? , with special reference to ASP. I don't want to spam the index, I just want to get my dynamically generated pages listed! Is a/v telling the truth, or was Rasmus right? TIA Sue