I have a website, it is split into 3 categories but using PHP its an all-in one kind of style. When a user chooses a category on the home page a session is set, this is then used to set the style and contents of the website. Would Googlebot and other bots be able to still scan my website? If a page is accessed and no session is set then the user is sent back to the home page. I have created special links, that set a session but go straight to the contact page. Even this page doesn't seem to be showing up. Any ideas if a sitemap with specially crafted links (to set the session) will help Google?