4. The authoring system of claim 1 , where the authoring inputs include specification of playback settings to control playback of the promotional media during the promotional mode.
4. The authoring system of claim 1 , where the authoring inputs include specification of playback settings to control playback of the promotional media during the promotional mode. 5. The authoring system of claim 4 , where the assembler module incorporates a kiosk-mode media player with the installable demonstration payload, the kiosk-mode media player being loadable onto the target electronic device and operative to play the promotional media in accordance with the playback settings.