TrainzObjectz is an excellent piece of software by TafWeb which has a nice, simple trainzoptions editor as just part of its very extensive functionality for TRS2004.
Here’s a screenshot of just that area. It will give you descriptions of each of the trainzoptions together with their normal settings, and allow you to make alterations very simply.
It also has the advantage of showing what the default values are should you need to reset any at a later stage.
I’m still finding ever more functions and uses within this freeware. I believe it’s a “must have” for ‘04ers who are interested in managing their content, adjusting the performance of the software, correcting errors, and general trouble shooting.
Alberte, mine is in the Auran folder, I don't have any other version installed, so I don't have a 'TRS2004' folder.
I presume that only comes in when you install more than 1 version. I didn't think about that when I answered.