Plot Squared is a mod that brings together many of the previous mods and really gives your players a great environment to be creative in while making it hard for others to grief or cause trouble. Plot Squared can take a bit to get configured at first as it uses multiverse, economy, sql, worldguard, and if desired the economy. For this setup we're going to edit the config file to add a new world and adjust some settings, then create a new world with multiverse and tell it to to use the Plot squared generator. We should then be able to teleport to that world and see not only the terrain being setup as we specified, but also be able to claim plots. Then we'll setup the permissions so players can also claim a plot for themselves.
Lets start with adding the mod to your plugins server, start and then stop the server so that the necessary files are generated for us. Like in Multi-inventory there are two files we are going to look at for configuration, one that handles the SQL setup, and the other that handles the mod settings. The SQL setup file is found at pluginsPlotSquaredconfigstorage.yml and you just set it up like you have with other previous mods if you want to use SQL, I didn't have any problems not using SQL but if you plan to do a lot of plot world work, I would suggest you get it setup before continuing.
In the same folder 'pluginsPlotSquaredconfig' there is a settings.yml file that we now want to look at and make some changes to so that when we generate the new world it will automatically work with PlotSquared. The File itself is not layed out intuitively, with the first section being some settings from the mod, then it goes into the world settings, and then back to some generic mod settings, I'll try and make this move obvious so you know later on where to make some changes to add another plot world to your server if desired.