[NTG-context] gnuplot

Hi list, I'm having some problems with gnuplot. I installed it as an extra module (means I guess, it is already installed via --modules="all"). Now, I want to use it directly in my ConTeXt-document, without compiling/preprocessing it first. In the gnuplot documentation I just found, how to create a pdf-document (nothing about implementation in context). I tried the minimal example from http://wiki.contextgarden.net/Gnuplot , but I recieve just a .plt-file. I hope some of you do also use gnuplot and can help me easily. Thanks.