A question to the experts:
is it difficult to change one of the multitexture shaders of 3dgs
to use the alpha channel of the textures?

I didn't find anything within the shader tutorial about alpha, and the wiki, the second source where I expected information, doesn't show up.

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