James,
With respect to estimating code size expansion, the ACES does exactly that
(among other things).  If you just want these results for Ada 95, then use
the Ada 95 tests only.  Then you either run Single System Analysis or
Comparative Analysis (I can't remember which one does the size expansion
measurements -- see the documentation).  If you have to use Comp Analysis,
you can use the sample data set distributed with the ACES as your other
set of result.

Questions?

Fire away.

Phil Brashear
SIGAda PIWG Chair