A friend of mine  runs a small record label, named Flemish Eye . He's a great designer and understands PHP well enough to do most things, but I help him with anything that falls out of his expertise. He recently approached me with a request to build a secure download section.
The basic idea is that wants to provide a free download of the songs in an upcoming record in mp3 format to whomever purchases the record. So he would generate a set of secret codes, and