Well... and again I found a solution myself.
The original problem was:
I wanted to install jpilot. But jpilot needed gtk-config. I couldn't find either gtk-config or glib-config on my system.
I tried to solve it following way:
I installed gtk+-1.2.8 and glib-1.2.8, with no visible effects. So i tried to install gtk+-2.0.4 with essentials. Again: The same problem.
Solution: This morning I scrolled the internet in order to find "gtk-config script 1.2.8", and I found out that one needs the DEVEL-Package... Well, I downloaded gtk+-1.2.8-devel from gtk.org, installed it and was able to install jpilot (after installing intltool).
But thanks for your help again
I'm "looking forward" to my next problem and wonder what it'll be...