1. In ConTeXt all map files are in fonts/map/pdftex/context/*.map
That's the wrong location. There is nothing pdftex specific in these files, so the "syntax" is dvips, not pdftex. I have told Hans about it. The level below fonts/map is "syntax" according to TDS 1.1.
So my question is how I could update ConTeXt safely ? Which directory structure I have to follow ? teTeX will continue to work if map files installed in ConTeXt's structure ?
The TDS tells us where to put those files and even though Hans does not care much about dvips, I suggest that he moves his files. Some files don't have a proper newline in the end, so they are not even proper text files. Thers is no non-whitespace difference between teTeX's files in fonts/map/dvips/context and cont-tmf's fonts/map/pdftex/context, so you can just ignore the files from cont-tmf. So, I suggest that you unpack cont-tmf.zip in a temp directory rm -rf fonts/map/pdftex/context rm -rf tex/latex cp -a * /to/your/texmf-dist (teTeX has aliases for the files that context distributes in tex/latex, so we don't need these files). Thomas