got a PM from sober asking if it was possible to choose your starting location for the historical missions. Before I had discovered the breakthrough when working on the real navigation it was not possible. But since discovering that breakthrough I've been able to make this happen (and discover another important breakthrough

). So a new setting has been added to the mission settings dialog box:
when you click 'Change' a HUGE world map will become visible. It starts out allowing you to pan it with the mouse. It acts just like all draggable items (left click and hold and drag). When you have the world map in the general vicinity of where you want to start you press the 'Tab' key. This takes the world map out of pan mode and into click mode. Now whereever you click on the map will be your new starting location

If you want to re-enable pan mode then press 'Tab' again. Once you click on the map to set your new location the map will hide. If you want to change your decision then click 'Change' again. If you decide you do not want to set a new location then press the 'Shift' key to exit.
In order for the change to persist you have to click 'Apply changes' as usual.
Start the game and you'll find yourself in a new location

This is great for testing (especially for W_Clear's environment mod to see the different climate zones)