DOSBox is not needed! Just start the game by double-clicking "secrets.exe" on Windows.
Norbert is also providing a Linux binary in the package at popot.org:
http://www.popot.org/custom_levels.php?mod=0000153
This is the 'definitive' version of the mod, I think. (although I could do maintenance updates in the future, if needed)
Please see the post above for an overview of what's new!
Good luck, and happy holidays!
