Index: /tags/ipp-20150115/ippconfig/recipes/ppSub.config
===================================================================
--- /tags/ipp-20150115/ippconfig/recipes/ppSub.config	(revision 37948)
+++ /tags/ipp-20150115/ippconfig/recipes/ppSub.config	(revision 37949)
@@ -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
Index: /tags/ipp-20150115/ippconfig/recipes/reductionClasses.mdc
===================================================================
--- /tags/ipp-20150115/ippconfig/recipes/reductionClasses.mdc	(revision 37948)
+++ /tags/ipp-20150115/ippconfig/recipes/reductionClasses.mdc	(revision 37949)
@@ -569,4 +569,12 @@
 	JPEG_BIN1	STR	PPIMAGE_J1
 	JPEG_BIN2	STR	PPIMAGE_J2
+END
+
+# specific for PV3 WSdiff processing to do inverse phot
+WARPSTACK_PV3       METADATA
+        DIFF_PPSUB      STR     WARPSTACK_PV3
+        DIFF_PSPHOT     STR     DIFF
+        JPEG_BIN1       STR     PPIMAGE_J1
+        JPEG_BIN2       STR     PPIMAGE_J2
 END