I´m seeking an script to manage points for purchases similar to those used to manage airlines miles. It must have a interface face for the user (the customer) and a interface for the administrator (the company). Among other features: the user should be able to register, upload their points and view the movements and their account balance. The administrator must be able to validate the load and register the movements and remove the points when customer used. It may be a suitable pre-made script. It should be easy to install and have to be in Spanish.