In reply to:

I *think* that RMM calculates them when you send tunes to the Karma


Yep.

jEmplode has been using the same algorithm for computing RID's for a while. Roger sent me the rules for it many moons ago. I haven't checked to see if the Emplode that matches the Empeg 3.0 versions compute RID -- they might.

In reply to:

then you're stuck using Jemplode after that


Just to clarify -- You're not necessarily stuck using jEmplode, but as long as you want to preserve your hierarchical playlists, you must use jEmplode. Just want to make it clear that you /can/ go back to using Emplode at any time, but it will just "fix" your playlists.