I don't have time to verify the right module numbers but you'll get the idea.
To trip the alarm with DS10A/MS10As that are out of range of the DS7000 but in the range of the V572RF32, do the following
Hook 1 DS10A up to a um506??? (uM506 set to continuous contact)
set the UM506 to say house/unit f3
register this DS10A into the DS7000
Register all your other DS10A's with the V572RF32
Have a macro triggered by the PLC house/unit code that is associated with the DS10A/MS10As on V572RF32 (let's say trigger g2 on, set F3 off)
Have the macro send a PLC to turn off the UM506 (F3)
This will break the contact on the DS10A hooked to the UM506 and will trip the DS7000 alarm since it is registered to it.
Caveat Emptor: Your DS7000 can now be tripped by a PLC command. I would block out all RF receive on the F housecode in this case. That would eliminate a stray F RF signal and would leave only a PLC F command coming thru your electric service.
I don't know if you can do this with the V572RF32 but if you can set all of house/unit codes for all of the DS10A/MS10A's that you register into the V572RF32 to same house/unit as the UM506 (F3 and OFF) then you will not even need a macro to trigger the alarm. It will be triggered directly by the V572RF32.
Here's also a link that explains another DS10A/UM506 application.
http://www.x10community.com/forums/index.php?topic=13487.15