Is there a central location that explains how to set everything up with the most recent releases?
I doubt it. The initial shared memory setup and UPD port was done quite awhile ago. Over several releases it became broken and neglected.
Firebird gratiously repaired and expanded it and helped Andy and I get SIOC talking to it, too.
But I don't know of anyone recently that's tried UDP Speed with it?.... You may well be the new guinea pig?

If, as Firebird says, the issue is with the UDP Speed configuration, you may want to PM DickDastardly (if he's even still around?) and see if he has any insight.
That was his baby, afterall.