It works with the last instructions, via bookmark. At least it seems, because I don't see the difference, and therefor the advantage.
But, I'll take a closer look as soon as I have more time.
What do you mean by 'foldable navigation'?

http://www.puppenheim.org/
http://www.wuerfels-welt.de
Old Game Tutorial: http://www.puppenheim.org/MITutorial.zip
Free Game Editor: http://puppenheim.org/AlienalsWeihnachtsmann.zip
http://www.puppenheim.org/blender_starting_main_settings.txt