CTSim
CTSim runs only at screen resolutions of 800x600 and 1024x768. If you see the screen below, you must change your screen resolution. (This screen will not appear in English.)
The installation program runs at any resolution.
Installation instructions:
Save the install program on your computer by using the link below.
Run the install program.
Registration
To avoid annoying reminders you need to register the program. You may register by sending an e-mail to the program's author Monika Muthsam.