Thanks for your answers so far! laugh
The explanations from the link look quite clear.
Can't wait to read through the manual and take the first steps of scripting when I have time.

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