Hmmmmmmmmmmm.
Betcha didn't know this!    &;^)
MPE is a complete, secure media distribution system, with built-in E-Commerce, digital rights management, distribution and visual display. MPE files do not require an external player or any other lengthy downloads, as each file contains an embedded player; MPEs play automatically when clicked. It works on both PC and Mac platforms, and is a much richer and more powerful marketing tool than any other system available today. MPE is a secure wrapper, delivering any type of media content.......
http://ipw.internet.com/e-business/development/961086691.html