The first thing that I did was write the CTR_Bahndaten without the program. (With Notepad and the models. There are examples in the CTR Creator folder. There is also a tutorial at RCT Lounge on how to do this. Just google search RCT3 CTR Creator tutorial). When that is done, save it and click on the button that says GUI for CTR_BahnDaten. It should bring up the CTR _Creator assistent. At the top of the window, "click open ride" and open the CTR_BahnDaten that you saved earlier. This should replace all of the ","s with "."s. For example, 16,000 becomes 16.000. When it's loaded, make sure that everything is right, and make any final adjustments and hit "Save Ride(*.txt)". It should save the information as a .txt document. Close the assistant and hit "Read CTR_BahnDaten.txt". Select that same notepad document, and then hit "Create Ride.ovls". Finally, hit "Install Ride.ovls in RCT3". Let me know if anything is not clear, and I will try to make it easier to understand.