Having complained more than once that saving and resuming an activity while operating the DB-G6 is impossible, I'm now ready to declare that it can be done -- most of the time. Here's how: before saving, be sure that the DB-G6 's desk controls are inactive: brakes set to "Hold" and throttle set to "Off". If you've used both desks, check them both. Press ESC and then S to save. When you're ready to resume, follow the usual procedure: activate any route and click on the "Resume SaveGame [sic]. Warning: if you haven't followed these instructions before saving, you may find yourself at the location where you saved, but without an engine!