Read bottom of wikiconfig.py starting with #DEVELOPERS. Create the files described and fill the wikiconfig_editme.py with a nice set of options that are useful for all developers. Include bunches of options that developers could easily comment out, uncomment, or edit.
Include options like superuser, theme_default, acl_functions, etc, etc. Comment out the more specialized options after testing.
Copy the files to contrib/wikiconfig/ and add to hg version control so other developers could easily copy and paste. Change wikiconfig.py to note location of override files.