Index: trunk/ippconfig/recipes/ppSub.config
===================================================================
--- trunk/ippconfig/recipes/ppSub.config	(revision 32658)
+++ trunk/ippconfig/recipes/ppSub.config	(revision 32674)
@@ -219,4 +219,13 @@
 END
 
+SSTF_DIFF METADATA
+	DUAL		BOOL	FALSE	# Dual convolution?
+	INVERSE		BOOL	FALSE   # Generate inverse subtraction?
+	PHOTOMETRY	BOOL	TRUE	# Perform photometry?
+	NOCONVOLVE      BOOL    TRUE
+	CONVOLVE.TARGET STR     SINGLE2	# convolution direction
+END
+ 
+
 # Gene's choice: multiplying by 1.75
 #@ISIS.WIDTHS	F32	1.8 3.3 5.8 10.2 17.9	# Gaussian FWHMs for ISIS kernels
Index: trunk/ippconfig/recipes/psphot.config
===================================================================
--- trunk/ippconfig/recipes/psphot.config	(revision 32658)
+++ trunk/ippconfig/recipes/psphot.config	(revision 32674)
@@ -508,4 +508,11 @@
 END
 
+SSTF_DIFF METADATA
+  PEAKS_NSIGMA_LIMIT_2                F32   4.0             # peak significance threshold  
+  DIFF_STATS			    BOOL TRUE	       # Calculate diff-specific stats
+  OUTPUT.FORMAT		            STR  PS1_DV2       # Format of output file
+END
+
+
 # Recipe overrides for PR reduction
 PR	METADATA
Index: trunk/ippconfig/recipes/reductionClasses.mdc
===================================================================
--- trunk/ippconfig/recipes/reductionClasses.mdc	(revision 32658)
+++ trunk/ippconfig/recipes/reductionClasses.mdc	(revision 32674)
@@ -165,4 +165,6 @@
         PSVIDEOPHOT             STR     PSVIDEOPHOT
 END
+
+
 
 # basic science analysis
@@ -262,4 +264,5 @@
 
 
+
 DEFAULT_MASKTEST		METADATA
 	CHIP_PPIMAGE	STR	CHIP_MASKTEST
@@ -282,4 +285,75 @@
  	BACKGROUND_PSWARP	STR	BACKGROUND
 END
+
+# SSTF tests
+SSTF_NOCONV		METADATA
+	CHIP_PPIMAGE	  STR	  CHIP
+	CHIP_PSPHOT	  STR	  CHIP
+	WARP_PSWARP	  STR	  WARP
+	STACK_PPSTACK	  STR	  STACK
+	STACK_PPSUB	  STR	  STACK
+	STACK_PSPHOT	  STR	  STACK
+	DIFF_PPSUB	  STR	  SSTF_DIFF
+	DIFF_PSPHOT	  STR	  DIFF
+	JPEG_BIN1	  STR	  PPIMAGE_J1
+	JPEG_BIN2	  STR	  PPIMAGE_J2
+	FAKEPHOT	  STR	  FAKEPHOT
+	ADDSTAR		  STR	  ADDSTAR
+	PSASTRO		  STR	  DEFAULT_RECIPE
+	STACKPHOT_PSPHOT  STR     STACKPHOT
+	STACKPHOT_PPSUB   STR     STACKPHOT
+	STACKPHOT_PPSTACK STR     STACKPHOT
+	STACKPHOT_SINGLE_PSPHOT  STR     STACKPHOT_SINGLE
+	BACKGROUND_PPBACKGROUND	STR	BACKGROUND
+	BACKGROUND_PSWARP	STR	BACKGROUND
+        PSVIDEOPHOT             STR     PSVIDEOPHOT
+END
+
+SSTF_NOCONV_4SIG		METADATA
+	CHIP_PPIMAGE	  STR	  CHIP
+	CHIP_PSPHOT	  STR	  CHIP
+	WARP_PSWARP	  STR	  WARP
+	STACK_PPSTACK	  STR	  STACK
+	STACK_PPSUB	  STR	  STACK
+	STACK_PSPHOT	  STR	  STACK
+	DIFF_PPSUB	  STR	  SSTF_DIFF
+	DIFF_PSPHOT	  STR	  SSTF_DIFF
+	JPEG_BIN1	  STR	  PPIMAGE_J1
+	JPEG_BIN2	  STR	  PPIMAGE_J2
+	FAKEPHOT	  STR	  FAKEPHOT
+	ADDSTAR		  STR	  ADDSTAR
+	PSASTRO		  STR	  DEFAULT_RECIPE
+	STACKPHOT_PSPHOT  STR     STACKPHOT
+	STACKPHOT_PPSUB   STR     STACKPHOT
+	STACKPHOT_PPSTACK STR     STACKPHOT
+	STACKPHOT_SINGLE_PSPHOT  STR     STACKPHOT_SINGLE
+	BACKGROUND_PPBACKGROUND	STR	BACKGROUND
+	BACKGROUND_PSWARP	STR	BACKGROUND
+        PSVIDEOPHOT             STR     PSVIDEOPHOT
+END
+
+SSTF_4SIG		METADATA
+	CHIP_PPIMAGE	  STR	  CHIP
+	CHIP_PSPHOT	  STR	  CHIP
+	WARP_PSWARP	  STR	  WARP
+	STACK_PPSTACK	  STR	  STACK
+	STACK_PPSUB	  STR	  STACK
+	STACK_PSPHOT	  STR	  STACK
+	DIFF_PPSUB	  STR	  DIFF
+	DIFF_PSPHOT	  STR	  SSTF_DIFF
+	JPEG_BIN1	  STR	  PPIMAGE_J1
+	JPEG_BIN2	  STR	  PPIMAGE_J2
+	FAKEPHOT	  STR	  FAKEPHOT
+	ADDSTAR		  STR	  ADDSTAR
+	PSASTRO		  STR	  DEFAULT_RECIPE
+	STACKPHOT_PSPHOT  STR     STACKPHOT
+	STACKPHOT_PPSUB   STR     STACKPHOT
+	STACKPHOT_PPSTACK STR     STACKPHOT
+	STACKPHOT_SINGLE_PSPHOT  STR     STACKPHOT_SINGLE
+	BACKGROUND_PPBACKGROUND	STR	BACKGROUND
+	BACKGROUND_PSWARP	STR	BACKGROUND
+        PSVIDEOPHOT             STR     PSVIDEOPHOT
+END
+
 
 # reduction class specifically for warpwarp diffs: