[NTG-context] newbie question: greek in ConTeXt?

After using LateX for a while, I became interested in ConTeXt and was immediately fascinated by the ease of use and the logical structure of commands. However, for my job, I need to typeset in ancient Greek (politoniko). There are a couple of packages for LaTeX that can do that (Teubner, psgreek e.g.), but can it be done in ConTeXt? I already stumble whenever I try to set the language to Greek; I get a couple of error messages (I use the standard teTex-distribution on a Mac with OS X 10.2). Can anybody point me to helpful documents or discussions? Thanks a lot! -- Thomas A. Schmitz Philologisches Seminar Universitaet Bonn Am Hof 1 e 53113 Bonn Germany