Scripting the DVD tray....?

Apple, ready to save $ 20 on its $ 3k G4/Dual 800 machines, decided to omit the knob to operate the front CD-DVD tray. (OK, it CAN be handled via the keyboard, but not if you happen have a Macally or other 3rd party keyboard…)
Is there a way open/close the DVD tray (without having a CD or DVD mounted) via scripting…?
Eelco Houwink