From what I saw on another post the Windows version of FASM checks it's ini file for enviroment variables to expand. Would checking for a conf/ini from which to have % enclosed variable expanded be a good thing for other versions of FASM?

That way instead of using the say INCLUDE system variable you could just set it in the conf/ini file and have that be the one that got expanded and if the conf/ini file is not there just have the current method be used.