diff --git a/ui (gen4)/features/base.js b/ui (gen4)/features/base.js
index c566682a..abaf2773 100755
--- a/ui (gen4)/features/base.js	
+++ b/ui (gen4)/features/base.js	
@@ -524,6 +524,22 @@ actions.Actions({
 	//
 	// NOTE: the cmp function is called in the actions context.
 	__sort_modes__: {
+		'name-leading-sequence': function(a, b){
+			a = this.images.getImageNameLeadingSeq(a)
+			a = typeof(a) == typeof('str') ? 0 : a
+			b = this.images.getImageNameLeadingSeq(b)
+			b = typeof(b) == typeof('str') ? 0 : b
+
+			return a - b
+		},
+		'name-sequence': function(a, b){
+			a = this.images.getImageNameSeq(a)
+			a = typeof(a) == typeof('str') ? 0 : a
+			b = this.images.getImageNameSeq(b)
+			b = typeof(b) == typeof('str') ? 0 : b
+
+			return a - b
+		},
 	},
 	// XXX this also requires images...
 	// XXX cache order???
diff --git a/ui (gen4)/features/ui.js b/ui (gen4)/features/ui.js
index f2dd2d5d..9c5e124a 100755
--- a/ui (gen4)/features/ui.js	
+++ b/ui (gen4)/features/ui.js	
@@ -170,6 +170,8 @@ module.ViewerActions = actions.Actions({
 		'sort-modes': {
 			'Sort by date': 'metadata.createDate birthtime',
 			'Sort by name': 'name path',
+			'Sort by name (XP-style)': 'name-leading-sequence name path',
+			'Sort by file sequence number': 'name-leading-sequence name path',
 		},
 	},