[NTG-context] convert old dvi files

I need to convert some old dvi files into pdf. One of the routes seems dvi --(dvips) ->- ps --> pdf But dvips (taken from the ConTeXt-beta distribution) complains "Couldn't find header file: tex.pro" Where can I find it? It doesn't seem present in the above mentioned distribution. Or is there a ConTeXt mtxrun-call or such, that can do it directly? Hans van der Meer