Index: configurations/Instructions/Instructions.conf
===================================================================
diff -u -r443d12eb212ea7409b6136bf94b97943f1bdc03a -ra0b715f64fe298bb268e308e0d54c8892c4190fc
--- configurations/Instructions/Instructions.conf	(.../Instructions.conf)	(revision 443d12eb212ea7409b6136bf94b97943f1bdc03a)
+++ configurations/Instructions/Instructions.conf	(.../Instructions.conf)	(revision a0b715f64fe298bb268e308e0d54c8892c4190fc)
@@ -12,6 +12,10 @@
 # [<Prefix '@' for advanced mode><Step Tite>^<User mode or sub step>]
 # "Title" = <Title string>
 # <Instruction step> = <image.png>
+# - OR -
+# [<Prefix '$' for HDF mode><Step Tite>]
+# "Title" = <Title string>
+# <Instruction step> = <image.png>
 # ######################################################################################################
 
 [Concentrates]
@@ -43,22 +47,21 @@
 Clamp the venous chamber line. = Installation_CPLD_5.png
 Clamp the heparin line. = Installation_CPLD_6.png
 
-[@Installation]
-Title = Install Concentrates and Blood Tubing Set
-Install acid and bicarbonate concentrates. = Install_Advanced_1.png
-Install blood tubing set and dialyzer. = Install_Advanced_2.png
-
-[Saline]
+[Installation^Saline]
 Title = Connect Saline Bag
 Hang saline bag on the hook. = Saline_1.png
 Clamp saline line. = Saline_2.png
 Use the saline line to spike saline bag. = Saline_3.png
-Unclamp saline line. = Saline_4.png
 
-[@Saline]
-Title = Connect Saline Bag
-Spike and connect saline bag. = Saline_Advanced_1.png
+[Installation^Substitution]
+Title = Connect Substitution Line
+Connect substitution line to the appropriate Pre or Post dilution port. = Saline_1.png
 
+[@Installation]
+Title = Install Concentrates and Blood Tubing Set
+Install acid and bicarbonate concentrates. = Install_Advanced_1.png
+Install blood tubing set, dialyzer, and saline bag. = Install_Advanced_2.png
+
 [Connect]
 Title = Connect Bloodlines to the Patient
 Clamp arterial and venous bloodlines (2 clamps). = Connect_1.png
@@ -79,3 +82,16 @@
 Title = Test Primary Carbon Filter
 Test the primary carbon filter and select the result below. = Water_Sample_1.png
 
+[Blood Return Setup]
+Title = Blood Return Connection
+Clamp arterial bloodlines and disconnect. = Connect_1.png
+Connect arterial bloodline to the saline y-connector. = Connect_2.png
+Unclamp arterial bloodline and saline y-connector. = Connect_3.png
+
+[$Blood Return Setup]
+Title = Blood Return Connection
+Clamp arterial bloodlines and disconnect. = Connect_1.png
+Connect arterial bloodline to the substitution line using a sterile connector. = Connect_2.png
+Unclamp arterial bloodline and substitution line . = Connect_3.png
+
+