seeking suggestions: stage directions "staff"

[Kieren MacMillan]

Hi all!

I'm engraving my current work -- a "live film" (as we're currently  
calling it) -- and would like some help on one matter.

In the score, I need to include (1) the script, and (2) stage  
directions. These items will be text, and will be synchronized with  
the music to some degree, but not rhythmicised in any strict way.

My current plan is to use one extra Staff context (with all the  
normal engravers removed) for each of these two text "streams", and  
simply attach \markuplines to notes (or rests or skips). Does anyone  
have a better suggestion?

Thanks,
Kieren.