Installing AUnit

[Tim Rowe <spamtrap@tgrowe.plus.net>]

I'm trying to install AUnit. I've downloaded the sources, run 
doinstall.bat, accepted all the defaults and -- now what?

The test code I'm developing falls over at:
with Aunit.Test_Cases;
because it can't find aunit.ads. Fair enough, I need to make it 
available, but searching my system I find I now have 3 files called 
aunit.ads, in c:\program files\GNAT\2008\share\examples\aunit, 
c:\program files\GNAT\2008\share\gps\aunit-2.03-src\template and in 
c:\program files\GNAT\2008\share\gps\aunit-2.03-src\test\src. None of 
those looks a very likely contender for the one I should make available 
-- which one should it be? (And how do I do that in AdaGIDE?)

Thanks in advance!