Index: trunk/ippconfig/recipes/ppSub.config
===================================================================
--- trunk/ippconfig/recipes/ppSub.config	(revision 33550)
+++ trunk/ippconfig/recipes/ppSub.config	(revision 34658)
@@ -90,4 +90,20 @@
 # Recipe overrides for DIFF
 DIFF	METADATA
+	DUAL		BOOL	TRUE	# Dual convolution?
+	INVERSE		BOOL	TRUE	# Generate inverse subtraction?
+	PHOTOMETRY	BOOL	TRUE	# Perform photometry?
+
+	# penalty of 1.0
+	# DUAL convolution is more sensitive to the number of kernels
+	# do not provide as many orders as for SINGLE
+        # @ISIS.WIDTHS	F32	2.4  5.0  10.0  # Gaussian kernel FWHM values
+	@ISIS.WIDTHS	F32	1.5  3.0  6.0   # Gaussian kernel FWHM values
+	# @ISIS.WIDTHS	F32	2.0  3.0  5.0   # Gaussian kernel FWHM values
+        # @ISIS.WIDTHS	F32	2.1  4.2  8.4   # Gaussian kernel FWHM values
+	@ISIS.ORDERS	S32	2    2    2     # Polynomial orders for ISIS kernels
+
+	SCALE.REF	F32     5.0		# FWHM reference for kernel parameter scaling
+	KERNEL.SIZE     S32	15		# Kernel half-size (pixels)
+	STAMP.FOOTPRINT S32	15		# Size of stamps (pixels)
 END