Wait, I've re-read the thread and I think I see what you're asking for.

You want a "leap to this point in the current playlist" feature.

The reason you want it is because you have only one playlist on the player and you always play it in the same order and you don't want to mess up that order just to play a given song.

What you're asking for isn't available, but if you want to bookmark your point in an existing playlist, you can use the Bookmark feature.