I think I already know the answer to this question ("no"), but I'll ask anyway.
I want to create two systems, one only visible when bxxx isn't set, and one only visible when bxxx is set (mutually exclusive systems, in other words, which will occupy exactly the same coordinates in the galaxy). I want b1 to be set by traveling through a wormhole from one system into the other; in other words, you go through the wormhole, and find yourself at the same coordinates in the galaxy, but a different system. If you go through it again, you're back in the original system (by unsetting bxxx).
Is there any way to do this? I tried having a silent mission be accepted automatically upon landing on the wormhole, but since it's wormhole you don't actually land... so that didn't work.
The only solution I can come up with is not using a wormhole at all, but rather a spöb made to look like wormhole (or something), which gives you a silent mission with b1 set, and also sets Nxxx placing you in the second system (and, if it's possible, a Qxxx as well, to make the player leave immediately).
Any other ideas?