To do it in amigados, just create a text file and put into it exactly what you'd normally type in the shell to start it up with your desired settings.
Next, create an icon (.info file) for the file (copy a project icon for this purpose). Set the default tool of the icon to be "C:IconX" and save the changes*.
Job done. You can now double-click on the icon to launch the game as if you'd done it from the shell.
And if you want to run the script from shell, either use execute command (execute script) or add S protection bit for it (protect script +s) and then you can run the script by just typing its name (just like any commmand).
