erlmacs automatically configures and updates your .emacs file with support for the emacs mode that is included with Erlang/OTP. It frees you from having to locate the installation directory of Erlang/OTP and its bundled emacs mode.It is an escript that only depends upon Erlang/OTP and Emacs.
Note: There is not much in the way of error checking at this moment, but it does make a backup of your .emacs files before any destructive operations.