|3ds Max 6.0|
The product comes with an interactive MAXScript-modifier which simulates authentic on-open-close-off mechanics at the users request (check out the preview-animation).
If your not acquainted with MAXScript, dont worry, it comes with thorough instructions.
Of course this plugin is not necessary, the scene have all procedures already animated. It's just for easy and accurate (and user-friendly) modification.
PS: Unfortunally there are no display-pictures or functions available at the time being.