Added a little more detail on the final packaging step

git-svn-id: http://svn.osgeo.org/qgis/trunk@15654 c8812cc2-4d05-0410-92ff-de0c093fc19c

INSTALL

@@ -1,7 +1,7 @@
 Quantum GIS (QGIS)
 Building QGIS from source - step by step
 
-Last update: 20110329
+Last update: 20110331
 Last change: 20110307
 
   1. Introduction
@@ -805,12 +805,29 @@ And run the nsis creation script:
 
 
 When the script completes, it should have created a QGIS installer executable
-in the ms-windows directory. If you want to include your own hand built QGIS 
+in the ms-windows directory (using the QGIS binaries from OSGEO4W). 
-executables, you need to copy them in from your windows installation into 
-the ms-windows file tree created by the creatensis script.
 
 
-    4.1.5. Osgeo4w packaging
+    4.1.5. Packaging your own build of QGIS
+    =======================================
+
+Assuming you have completed the above packaging step, if you want to include
+your own hand built QGIS executables, you need to copy them in from your
+windows installation into the ms-windows file tree created by the creatensis
+script.
+
+
+  cd ms-windows/
+  rm -rf osgeo4w/unpacked/apps/qgis/*
+  cp -r /tmp/qgis1.7.0/* osgeo4w/unpacked/apps/qgis/
+  ./quickpackage.sh
+
+
+After this you should now have a nsis installer containing your own build 
+of QGIS and all dependencies needed to run it on a windows machine.
+
+
+    4.1.6. Osgeo4w packaging
     ========================
 
 The actual packaging process is currently not documented, for now please take a