Witcher 2, The - Assassins of Kings Discussion
Also bear in mind, the game may be different in different regions, and of course different methods of distribution.
CH does trainers for NA releases of games mostly, and most of the time it generally works for all English versions, but with the Witcher 2 there is a censored version down under so possibly different .exe file all together.
But follow the guide, and also right click witcher2.exe found in the game's BIN folder and goto properties, in the new window goto the tab Information and check the version of the game installed and match it with the trainer version.
If you own the AUS Retail version, but not the US version, this is what you can do:
1. Install the game
2. Do the update by downloading the patch from the offical site, the US version patch should named "Patcher_ATARI"
3. Install the US patch
4. Enjoy the game with CH Trainer!!
* Updated game trainers and cheats daily
* Get notified when new cheats are added
* Request which games get new trainers
* Priority support with any problem