Upgrade Script for Upload Site

An Upgrade Script is 75%, it currently updates an upgrade script to a latest version. It has a bug, it finished upgrade, but is missing something, as the script cant function as a new version. So Task is to fix this and finish the job. It currently works likes this 1) Uses an xml file that will contain all sql code. 2) An [login to view URL] file that will update or remove unnecessary database tables, lines. 3) A checker to check current version and what version to update 4) Admin form, to check for New versions and to send email to owner of script 5) Then a user will have instructions on email to remove all files and run the [login to view URL] script 6) It will give succesful message, if failed it will give error messages why it failed I need a programmer with Programming Experience in Upgrade Scripts.