Index: /issm/trunk-jpl/externalpackages/windows/InstallInstructions.txt
===================================================================
--- /issm/trunk-jpl/externalpackages/windows/InstallInstructions.txt	(revision 11830)
+++ /issm/trunk-jpl/externalpackages/windows/InstallInstructions.txt	(revision 11831)
@@ -8,5 +8,6 @@
 -Make sure that when you install Matlab, you choose C:\MATLAB\R2011b as directory 
 for the installation. Failing to do so could preclude the sdk compiler from 
-finding the Matlab header files. 
+finding the Matlab header files.  Define environment variable:
+MATLAB_DIR="C:/MATLAB/R2011b"
 
 -Also pay attention to what version of Matlab you are using, 32 or 64 bits, 
@@ -102,10 +103,14 @@
 
 If this does not work, do not go any further! The settings of your cl compiler are found 
-in externalpackages/windows/configs/ 
-if there is a significant different between your sdk7.1.win7.64.sh file (see above section Compiler) 
+in externalpackages/windows/configs/
+First, you can try updating the user-specific settings to refer to your username and then
+trying to run cl hello.cpp again.
+If there is still a significant different between your sdk7.1.win7.64.sh file (see above section Compiler) 
 and the file that is being sourced in the windows/configs directory, place your new file in 
-the configs directory. Relaunch bash, and try to run cl hello.cpp again. Beware, you might 
+the configs directory. Relaunch bash, and try to run cl hello.cpp once more. Beware, you will likely 
 have to erase some lines in your file, as cygwin might not like some of the stuff that your 
-Windows platform is trying to define. 
+Windows platform is trying to define. To make sure that the correct bit compiler is
+being sourced in windows/configs (e.g. sdk7.1.win7-64.sh or sdk7.1.win7-32.sh) see
+section "One note about 32 vs 64 bit compile" below.