Index: /tags/ipp-20141024/ippconfig/recipes/ppSub.config
===================================================================
--- /tags/ipp-20141024/ippconfig/recipes/ppSub.config	(revision 37988)
+++ /tags/ipp-20141024/ippconfig/recipes/ppSub.config	(revision 37989)
@@ -182,4 +182,12 @@
 END
 
+# WSdiff for PV3 to do inverse phot
+WARPSTACK_PV3       METADATA
+        DUAL            BOOL    FALSE   # Dual convolution?
+        INVERSE         BOOL    TRUE   # Generate inverse subtraction?
+        PHOTOMETRY      BOOL    TRUE    # Perform photometry?
+        CONVOLVE.TARGET STR     SINGLE2 # convolution direction
+END
+
 WARPSTACK_1DG	METADATA
 	KERNEL.TYPE	STR	SIMPLE