Point System

I need a standalone PHP/MYSQL based point system for my present sites, as well as, future sites. Users may sign up for an account and earn, win or purchase points to use as a form of payment for other sites. Generally speaking, it will be similar to PayPal System or Dopays script minus the ability to cash out/withdraw funds. I am more concerned with the functionality rather than looks, as long as I can modify the front end via HTML or CSS. In short, invest your time and skill on functionality not color schemes and layout. Furthermore, I do not require virgin code written from scratch, so if you are able to modify a pre-written script or cut and paste snippets, I am fine with that. Again, I am primarily concerned with functionality. If it does the job--if it is a dependable script, I will be happy. I can also do without certain options and open to your recommendations. Script developer will be granted exclusive rights to legally resell script as they wish and retain 100% of profits in exchange for some technical support from time to time. Additionally, I anticipate the need for modifications/improvements to this script in the near future. (I will compensate you for any additional work done). I have minimal PHP knowledge, but enough understanding to setup MYSQL and install the script myself if accompanied with basic instructions. --User Functions-- User sign up and login Functions: -Users can signup for points account by submitting only their email and chosen password -System assigns account number and emails info to new user -SSL supported login with “Forgot your password” and “Remember Me” options User Account Functions: -View/Search/Print balance & transactions (Transactions of points used at other sites) -Send/Reply to messages from admin (internal messaging system) -Purchase points by package or enter custom amount -View/Search/Print payment history (Payments for points) -Send invitations to multiple friends at a time to sign up for an account -Send points to a specified account number or multiple account numbers (sending points will count as a purchase/transaction) -Change password or email -Close account -Account Event notifications (i.e. password changes, new messages, "someone has sent you points", etc.) -invoices for point purchases are emailed to user --Admin Functions-- System Configuration Options: -Edit Admin User/Pass, Email, Site Title, Meta Tags & Date/Time format -Configure password length and max number of login attempts -Enable/Disable signup -Enable/Disable and specify Signup Bonus or Signup Fee -Add custom fields to sign up form -Customize email templates User Management Options: -Add new accounts manually -Edit/Suspend/Delete/Close user accounts manually -Send/Reply to messages from users; message all users, email all users -Send points to a specified account number or multiple account numbers -Enable/Disable user specified purchase amount w/ option to set min/max -Create/Edit/Delete package deals -View user’s IP history, Ban/un-Ban IP -Configure user account permissions -Create additional admin accounts and configure permissions Rewards Options: -Enable/Disable Awards feature -Specify amount of points awarded for purchases/transactions, sending invites and new users who signup as a result of an invitation Accounting: -Select payment methods (ex. [login to view URL], check/cash/money order, etc.) -Add new payment methods/gateways (need [login to view URL]) -Generate HTML/Encrypted code for shopping cart button/link -View/Search/Edit/Delete/Print payments by date or string (account #, email, invoice #) -View/Search accounts by string (account #, email, start date, status, IP, etc.) Backup: -Import/Export selected fields -Backup/Restore database