I recently put Final Fantasy on my USB stick and it shows as three separate menu items on the Aurora Dash.
Here's what I did do:
1. Put each disc entry in three different directories in the same upper directory, like so:
Final Fantasy XIII
- Disc 1
- Disc 2
- Disc 3
2. Turn on autoswap in Dashlaunch.
3. Turn on NOvA Plugin.
I am at a loss of what to do.