[NTG-context] Mark IV and pre-processing input file processing.

Hello, I started playing around with ConTeXt/LuaTeX and have a question here wich is related to a pet project of mine: is it possible to tell Mark IV something like this

texmfstart texexec --lua --environments=myfile.tex someotherfile.zip where 'myfile.tex' should contain a lua routine which would unzip 'someotherfile.zip' to /tmp and call LuaConTeXt on a file actually contained in the archive (among others)?

While I'm sure this can be done in Lua, I wonder whether somebody can point me at how to access the names of files to be processed ('someotherfile.zip') from the running process ... Not sure whether I can make myself understood here ... please ask if I'm not making sense, Joh