When a customer purchases a license for an internet script, the customer is provided with a unique username and a password to log on and to download the script right after they pay. A good example is vbulletin.com.
1) If I have a script that I would like my visitors to download once I provide them with the unique username/password, how can I setup such method on my website?
2) The visitor wants to download something from my website. I require their e-mail. The visitor submits their e-mail and right away, they are provided with the download link.
How would I be able to do such? Your help is very appreciated. Merry Christmas.