Lawder,
Yes, you can do this on the 950, using variables. Download my 950 config file from this site and take a look - I do exactly the same thing to jump back to an activity from lighting control, or from audio/picture tweaking. I don't use the nav+/- or page +/-, just nested macros and goto pages. I think the theory is explained fairly clearly in my post that you linked to, but please post back if it's unclear.

Good luck,
Neil