[Xastir] Third party packets

[ke5c]

You can argue with the practicality, but I'm trying to dump position 
packets from a DStar radio/repeater to the standard APRS frequency via a 
digi co-located with the DStar system.  Is there a way (I doubt it) to 
get Xastir to accept third party position packets?  IGated packets seem 
to always come out in third-party format which is probably appropriate. 
Here's what happens -

Original packet received from a Lowrance AirMap 100 feeding an ICOM 
IC-91AD's low speed serial port via DStar (DSTARInterface + 
javAPRSIGate + javAPRSSrvr) on 440.525 (K5CTX-B):

KE5C>APJI23,DSTAR*,qAR,K5CTX-B:!3104.32N/09723.59W-360/000 
TESTING/A=000568

The same packet gated to RF (same site and computer, different instance 
of javAPRSSrvr + javAPRSIGate + KISSInterface) via TNC on 144.39 
(N5TD-15):

N5TD-15>APJI23,WIDE2-1:}KE5C>APJI23,TCPIP,N5TD-15*:!3104.32N/09723.59W-360/000 
TESTING/A=000568

73, John