I am very new to php/MySQL database. I have a few questions which i haven't found answers for. Basically, i can figure it out if you point me in the write direction...
Where can I :
1) Change the paypal email address
2)change payment amount
3) change duration of sponsor/paid listing
4)add a coupon

I believe that i am supposed to do most of this via phpmyadmin however i do not know what values to add to some of the fields.

You don't need PHP/MySQL skills as all the above items are in the admin section of the script.