[NTG-context] How to use m-cweb module

I was looking at the CWEB demo off the pdfTeX page. Can someone please tell me how I would use the m-cweb package on TeX, the program web file. The first step would be to create the tex file itself using 'weave tex.web' Than I suppose I have to create an input file for conTeXt. What would be the contents of this file and mods do I have to make to tex.tex before I run it through texexec? Also I am interested in the screen optimized version of it. Salman