customization work for php mysql questions and answers script

i have a website at [login to view URL] running a php mysql q n a script (famous questions). i need the following work done: 1. related question module (modify the existing module) 2. related answers module 3. recent unanswered questions module 4. create a question modifications 5. alternate wordings + searchstring save module - based on growth and cache rate (I will provide logic) 6. custom menu based on keywords i will send in depth descriptions for each to qualified candidates. you will need to copy files into a test folder and create a copy of the db to work with. when completed you must integrate back into main code branch. we will need documentation of what files are edited and you must put comments in your code so we can easily identify your work if we want to upgrade the script in the future.