65829 PHP link exchange script

Hi, I need a link exchange script. 1. Done in Php/MySql 2. Search engine friendly URLs, plain text links. 3. It should have categories and when you're browsing one that is recorded if you press on Click to add. Example. You're browsing the auto category and click on “add link”. The auto category is automatically selected. Also, have the drop down box to change that if needed. 4. Check for reciprocal link. 5. Option to allow the recip link to be on another domain. 6. Option to add automatically or admin approval needed 7. Check for reciprocal links on demand, and flag and remind to those who removed it. 8. Ability to exclude some links from the reciprocal link obligations. 9. Send “Link Added” or suspended e-mail with URL, listing etc. 10. Date added. Expire link after x amount of days if recip link isn't added. 11. Add link first and invite other site to add link back by sending preset e-mail with the details. Reminders to add the recip link, a total of x number of reminders. 12. Templates and stuff. Maybe a menu that says Links Home> Current Category 13. Write files on it's own folder. Example: /other-sites/[login to view URL] 14. Password protected admin section 15. Backup. 16. Plus any other features that should be there but I forgot. I don't have a lot of money for this so be gentle :-) Thanks,