You have just touched on one of my biggest gripes about Trainz, the lack of a tangible User/Technical Manual. Spread across the web from this Forum to Wikipedia, YouTube to Google you can discover most things about Trainz and when all else fails you ask within this Forum as you have and with few exceptions there is usually someone who will kindly share their knowledge with you. Unfortunately unless that required information is elsewhere in copy, which it frequently isn't, and can be easily referenced as with perhaps Drive Commands it is difficult for anyone to provide an all inclusive comprehensive answer. If after seaching you are still at a loss on specific commands it may be worthwhile proposing that those and other commands are made a topic for a future Trainz TV tutorial. Peter