Nintendo DSI: Shuffle ALL m4a music files

[Niku]

Am i missing some thing, or is there no way to organize 16 song folders and have them all play one after another randomly? Is the shuffle only going to work inside one folder? Does any one even understand what im talking about?

EDIT:::
I figured out how to do an All shuffle. The symbol for All Shuffle does not look like the other folder shuffle icon, so it was hidden in plain sight. Ignore me.