Client Area/Management Needed!!! ASAP

Need something very basic, but something that does the job. ***USER END*** # I need a php/ajax script building that will allow customers to come to my website, signup for either a trial or a subscription. (when a user has signed up i would like an email to to be sent to say thankyou ect) # Once signed in, the script will need to hand out a line of code in which is unique to every user, the line of code needs to contain there username as the username and a made up password containing numbers only. (this line of code will not need to be emailed, however an email will have to be sent saying your Trial/Subscription is now active login to view ect) # When they also login they need the option to be able to add more "lines of code" onto there account, so if they had 2 lines, when they login it will show both lines and there expire date. (An email would be needed when the line of code is getting close to its expire date) # All the payments need to be handed via PayPal if possible please. (An email would be needed when a payment has been made and received.) **** BACKEND **** # Just need a simple, add and remove users section, and a way to edit the email templates that are sent from the system. If you think you are up to the job, get in touch, price can vary depending on the ammount of work you put into do this project for me.