Subpictures in DVD-lab

I created a menu, one video title set and included 4 episodes. I managed to keep 3 Audiostreams but I have no idea how to include the subpictures. They’re already in the VOBs but not listed in the ifo. So I can only switch them on in VideoLanClient.

Any simply idea? I’m pretty new to this stuff.

OK, I managed it now on my own. It’s rather cumbersome but it works.

However, how can I set a language as default? And how can I set subpicture as hidden?