Here at Easy we have additional global and local config files in play and they get included by the config.php if they exist. Unfortunately, the built-in config rewriting stuff axes our additions, so we’ve rewritten the functions that touch the config file to play a little more nicely via two additions to the core functions file. I’ve packaged up diffs against the current build if you’d like to consider incorporation in future revisions to 1.6.x (which I realize is no longer in development). These changes may be applicable in 2.x as well, but I have not looked.