I already have a playlist for “Whatever you want to call it” with a lot of these tracks in it.

Oh, you already have the tracks on your player, OK.

I assume the tags are filled out correctly? Then it's easy. You have to use Jemplode, though, because Emplode doesn't do this:

- Fire up Jemplode and connect to the player with Ethernet.

- Select the Artists/Albums soup view.

- Group-select the artists you wanna make playlists out of.

- Edit/Copy.

- Select the root playlists tree.

- Edit/Paste.

Jemplode makes a nice little playlist tree based on that Soup view.

Eventually, you won't need to do this and the Soup views will be playable directly on the player. But for now it's a good work-around.