Text Spanner with more than two words

[Jonathan Wilkes]

Hello,
     What's the easiest way to do text spanners with, say, three or 
four words?  So something like:

accel.---meno mosso---rit.---a tempo

I've tried using above-staff decrescendo and setting the text as needed, 
which does work, but then I have to create another layer if there are also 
hairpins.

I checked NR and snippets, but couldn't find anything.  Is there a better 
solution?

Thanks,
Jonathan