[RMMV] TRYING TO REMEMBER HOW THE EXTRA MAPS PLUGIN WORKS

So, for a few of my projects, I have determined that I'll need more than 999 maps. I know that sounds crazy, I really do, but I have to think of how likely I can get the game's story told in the default amount of maps... which, honestly, is not very likely at all.

Well, with that said, how do I use the plugin? I wish to keep that in mind for future reference.