342628 Rayzz script modification

Hi, i have a video site and i am using Rayzz Videos Sharing script [login to view URL] you can login as user or admin in to this demo. It already has a payment system and what i want to change is that the payment system is set to one payment for life time and i want to change to monthly. Also one main change i want is that a user can only watch 5 videos and after that they will need to become paid user to keep watching.[ i should be able to change this numbers]. The site already have download button and i want only paid users to see it. The site is already up and runing. Thank you and good luck bidding.