Just tried to create a second skin in blender and got it! - yeah, I didn't find out before, didn't expect that it is that easy wink - and now I have to say: Go for it, ventilator!
Maybe, it could be of use for me within the next days! :P
Its, because my fish game shall get a background with an ocean 'landscape' yet! Never planned that. frown But I have to do it.

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