diff --git a/ui (gen4)/Makefile b/ui (gen4)/Makefile
index 3593a7c8..dcc3bb7c 100755
--- a/ui (gen4)/Makefile	
+++ b/ui (gen4)/Makefile	
@@ -35,6 +35,8 @@ CSS_DIR=css
 NW_PROJECT_FILE=package.json
 JS_FILES := $(wildcard *.js)
 HTML_FILES := $(wildcard *.html)
+CHROME_APP_KEY=chrome-app.pem
+
 
 # get files to minify...
 JS_MIN_FILES := $(patsubst %.js,%.min.js,$(wildcard *.js))
@@ -43,6 +45,7 @@ LOGS := *.log
 
 NODE_DIR=node_modules
 BUILD_DIR=build
+CHROME_APP_BUILD_DIR=build/Chrome-App/ImageGrid.Viewer
 WIN_BUILD_DIR=build/Win32
 MAC_BUILD_DIR=build/MacOSX
 MAC_10_6_BUILD_DIR=build/MacOSX-10.6
@@ -80,6 +83,8 @@ $(NODE_DIR):
 	mkdir -p $(NODE_DIR)
 $(BUILD_DIR):
 	mkdir -p $(BUILD_DIR)
+$(CHROME_APP_BUILD_DIR):
+	mkdir -p $(CHROME_APP_BUILD_DIR)
 $(WIN_BUILD_DIR):
 	mkdir -p $(WIN_BUILD_DIR)
 $(MAC_BUILD_DIR):
@@ -132,6 +137,12 @@ dev: css
 # build targets...
 # XXX most of the code here is duplicated, find a way to reuse sections...
 
+chrome-app: $(APP_ZIP) $(CHROME_APP_BUILD_DIR)
+	unzip -u $(APP_ZIP) -d $(CHROME_APP_BUILD_DIR)
+	cp manifest.json $(CHROME_APP_BUILD_DIR)
+	rm -rf $(CHROME_APP_BUILD_DIR)/node_modules/
+	#chrome --pack-extension=$(CHROME_APP_BUILD_DIR) --pack-extension-key=$(CHROME_APP_KEY)
+
 # node-webkit win32
 win32: $(APP_ZIP) $(WIN_BUILD_DIR)
 	unzip -u targets/node-webkit/node-webkit-*-win-ia32.zip \
diff --git a/ui (gen4)/images.js b/ui (gen4)/images.js
index 3913db66..594f912b 100755
--- a/ui (gen4)/images.js	
+++ b/ui (gen4)/images.js	
@@ -258,6 +258,10 @@ module.ImagesClassPrototype = {
 var ImagesPrototype =
 module.ImagesPrototype = {
 
+	get length(){
+		return Object.keys(this).length
+	},
+
 	// Generic iterators...
 	//
 	// function format:
diff --git a/ui (gen4)/testing.js b/ui (gen4)/testing.js
index 1aa20a91..c9303533 100755
--- a/ui (gen4)/testing.js	
+++ b/ui (gen4)/testing.js	
@@ -100,6 +100,12 @@ window.load2014 = function(){
 }
 
 
+window.loadInsta = function(){
+	return glob('l:/mnt/Dropbox/Instagram/fav/ALL/*+(jpg|png)')
+		.on('end', function(l){ window.a.loadURLs(l) })
+}
+
+
 
 /**********************************************************************
 * vim:set ts=4 sw=4 :                                                */
diff --git a/ui (gen4)/viewer.js b/ui (gen4)/viewer.js
index 310cc1a8..3737146e 100755
--- a/ui (gen4)/viewer.js	
+++ b/ui (gen4)/viewer.js	
@@ -210,7 +210,7 @@ actions.Actions({
 	loadURLs: ['Load a URL list',
 		function(lst){
 			this.images = images.Images.fromArray(lst)
-			this.data = data.Data.fromArray(Object.keys(this.images))
+			this.data = data.Data.fromArray(this.images.keys())
 		}],