All models are either generated or modified by code realtime, and all movement done with code, synced to music manually by hand.
At the time I was heavily into using Macromedia Director (now Adobe Director) and Shockwave 3D. This is a bit dated browser plugin technology now, BUT it is still developing, and there are current rumors Director 12 might be able to generate content/games to run on iPad2 and iOS, rumors! but exciting!?