bemfarmer,
It installs just like any other one and doesnt change your MoI installation.. You edit those files the same... Then make a shortcut to launch it.

To put the icon/button in your MoI UI like I have, you make the addition to the sidepane.htm file. Same as before.. (This is the file you may want to backup to be able to revert to a default install if you mess it up somehow.