Yep, it's a frontend for loading anything you like really.
It's mainly geared towards the whdload packs as it will come with a scanner to automatically generate the database based on which games you have 'installed'.
The menu comes with everything you need, screenshots, boxart, music, etc. It also comes with the latest version of WHDLoad and all the necessary files.
The only thing it doesn't come with is the kickstart roms which you'll need to put in devs/kickstarts yourself.
You can put your games anywhere, you just need to edit the setup.ini file to add in your game paths.
There are currently two flavours. One which is a standalone package. It boots from a startup-sequence straight into the menu and you play your games from there.
The second is a version which you can run from your existing workbench. Currently you have to manually copy the files but I will bundle an 'installer' with it.