YouSearch Search Engine algorithm and Index

I need an search engine built that will work along with my Dolphin Boonex site I need it where all websites are indexed and are searchable in my sites section of the site Then i need and option when they add a site to include the sitemap and then index there site and make it were sites that have been added by users have a higher search rank and are displayed Also i need and option on the join page of the site where i you can allow adult content or block it Then i need and option on any page when you add content to the site were you can mark it as adult content When viewing a site on boonex dolphin i want it to show related sites on the side of the page Dolphin Boonex is similar to WordPress