I do remember someone making a pack for this in an older version of FPSC X9.
Sorry I can't be more helpful, but it was many years ago and I don't remember who posted it. BUT if it was possible in an older version it should be possible now too.
EDIT
Who says the search function here is useless????
http://forum.thegamecreators.com/?m=forum_view&t=106552&b=25
The bars are not above the heads but on the bottom left of the screen. This pack is no longer available (2007 was the post date) but it does prove that this was possible in V1 of FPSC. Now we have so many more scripting commands and variables, so I don't see why this wouldn't be possible now.
A man will one day wear a tophat in glasgow on a sunny day juggeling grapes while humming the jurrasic park theme tune.