It seems that until now nobody had success to virtualize Cognos Impromptu with ThinApp for Windows 7.
The trick is easy. Capture under Windows XP SP 3, Start a Prescan, install Cognos, start the Postscan.
Afterwords open in the cognos bin folder “cer3.ini” and change the path in the second line “COGNLSTAB=C:\Programme\Cognos\cer3\bin\coglang.tab to any location in your ThinApp capture directory and copy the file coglang.tab to this directory. Now start the build process et voila, Cognos works