ROSPkgManager is a utility designed to make the installation/removal of simulations easier, the utility is created by Kristian Zarebski. The tool complements your Railway Operation Simulator placing all files from a downloaded simulation into the correct directories in order to be available from within the application. ROSPkgManager is also able to recognise an archived version of ROS itself, and can perform an update on the application.
The application can be downloaded here.
Documentation is available on the project website.