You're misunderstanding the advice about the "invisible planet" and why/how to use it, I believe. You uncheck "Render Surface" and it makes the planet surface invisible while keeping the atmosphere. The *only* reason to do this is so you can use atmospheric-type effects A: in addition to (rather than instead of) your regular planet atmosphere (i.e. you can make a normal planet with its own atmosphere and also rings outside of that), and B: to place atmospheric effects outside of where your main planet might restrict them to, by varying the size of the "hidden" planet, its atmosphere, etc.
I suggested the nebula preset because it seemed like you were having more fundamental questions, you said "Hey guys, Im trying to get clouds out in space. Something like DandelO did for planet rings a while back. Im not trying to make rings with the clouds, Im just trying to get them in space right now...". You hadn't asked about rotation yet (and still haven't in this thread, that question is in another thread).
As far as rotation goes, it really depends on how you're making your rings. If it's a population of Rock objects on a plane, for example, just rotate the plane and repopulate, I believe that would work. If you're using some kind of procedural or textural mask on a cloud or something, you might need to do something fancier. I don't know for sure.
- Oshyan
