Jukebox mode

[Raukgorth]

Hello.

I have few issues with Jukebox mode. Firstly I will explain what I want to achieve.
I want to play music at my "Line 3 (Virtual Audio Card)" channel. The music is playing at default system card, in that case "Speakers (Realtek High Definition Audio)" or any other I select as system default. However I fail to find any option to change audio output anywhere.

My ventrillo client is recording this channel so I can play music for my mates during wow raids. Some days ago I thought: I would be cool if they could select music they want or even upload some to my computer and then play it!
And it looks like Subsonic is the tool I need. It has this great upload feature and Jukebox mode! So I created new account for them, one account for everyone should be enough, right? So they don't play 10 songs at once.

But while testing everyone who was logged in created a new player which played at their computer. So I removed that user option "User is allowed to play files" and left only "User is allowed to play files in jukebox mode" but after that they couldn't play anything at all...

Everyone who logged in didn't see the current playlist on Jukebox, they had to create a new one. When I edited all the new players to play in Jukebox mode they were all playing at once...

So, how do I do this?