audio track on still menu in scenarist

I know that each time I try to drop an audio track on a still menu, scenarist rejects it as it seems impossible to add an audio track on still menu Is there a way to add an audio track with a still menu with using any trick such as creating empty motion menu or something like that ?

use still show instead of still menu

Try to use slide show to do this.

my mistake...sorry emistral, rdbello's right.