I'm having a mental breakdown.

Someone please correct me if I'm wrong.

A ZEN 7 "back-end" with schema upgraded, but NAL objects and ZEN policy
objects are ZEN 4 still.

A ZEN 4 agent can obviously read those.

A ZEN 7 agent can also read those (specifically the policy objects).

A ZEN 4 agent cannot read ZEN 7 policies?

Assuming just Windows XP and stuff (ie, no things using Win9x)