I modified the Welcome dialog to show the product version being installed:
The [Wizard] will install [ProductName] version [ProductVersion] on your computer.
I then created a commands file, and included a SetVersion -fromfile line:
;aic
SetVersion -fromfile ..\..\dotNet\dist\bin\debug\Server\Bin\Common.dll
build -force
Common.dll currently has a version of 0.0.4496.0, but when I run the installer, the dialog reports 1.0.0.0. if I explicitly SetVersion to a fixed value that value is correctly reported in the dialog.