Hi Michael

> Could anyone tell me what kind of screws (and possible additional
> parts) I need for installing the Proma-rails in a wooden case The
> local Proma-dealer just told me, that I need to get them in a
> DIY-store, but not what kind of screws and other parts I need...

You need screws of a type, which is called in German "Spax" (didn't find
a translation). A picture is like
http://www.multiarchive.de/assets/images/SpaxSchraube.jpg
I think, 25mm x 2,0 mm should be the right dimension

You have to drill 2.8 mm holes in the rails, which are located far
enough from the front bar, but leave at least 1 mm front the rear (or
call it inner) border of the rail.
If you want to be perfect you can drill a 6mm wide, 0.8mm deep conic
section for the head of the screw (in German the tool is called
"Kegelschnittbohrer")

Florian