You pretty much have it. The guy at the shop doesn't want to install them, because that implies warranty. Most ring manufacturers give a little booklet with their stuff explaining how to put the rings. I put mine on with the top ring towards the back (furthest from the forward notch), second ring about an inch or so from the notch, and the oil scraper rings on the opposite side, with the joint in the middle and the ends 1 inch either way so it would look like the ends were all set out into a pie cut into thirds. :wrench:
Just a side note, but the pistons are the same as 4.0L ones, except they are slightly thicker. They are what I am using for my stroker.