Halo 2 Limited Collector's Edition Fan Creations

The Fan Creations is a secret option on the Halo 2 Collector's Edition menu.

Walkthrough
On any section of the DVD (NOT watching the movie, just the sections), press and hold the left button on your DVD remote. It should cycle quickly through the selections of the section and soon, it will send you into a secret art gallery. Each section has a different gallery.