[!HaGaR!]

As far as I know this file is not simply a replaced .exe - it is a bootloader instead.
It mounts an in-build mini-image under use of daemon tools, cheats the starforce-key-protection by writing the mini-image-compatible dvd-key into the registry and then finally executes the game.

To sum it up: You don´t need your huge dvd-decrypter (just a simple .iso-image!) generated image. It should work without it, though.

Grx.
!HaGaR!