diff --git a/utility.sh b/utility.sh
index 068b833..7dcf7ad 100755
--- a/utility.sh
+++ b/utility.sh
@@ -23,23 +23,30 @@ check_dir()
 
 install()
 {
-	DIR=$1
-	check_dir "$DIR"
+	DESTDIR=$1
+	check_dir "$DESTDIR"
+	if [ -z "$2" ]; then
+		PREFIX=$DESTDIR
+	else
+		PREFIX="$2"
+		DESTDIR=$DESTDIR$PREFIX
+		echo $DESTDIR
+	fi
 	
-	mkdir -p "$DIR/share/SimplePanoramaViewer/"
-	mkdir -p "$DIR/bin/"
-	mkdir -p "$DIR/share/applications"
-	mkdir -p "$DIR/share/mime/image"
-	cp SimplePanoramaViewer "$DIR/share/SimplePanoramaViewer"
-	cp -r css "$DIR/share/SimplePanoramaViewer"
-	cp -r html "$DIR/share/SimplePanoramaViewer"
-	cp -r js "$DIR/share/SimplePanoramaViewer"
-	cp install/SimplePanoramaViewer.desktop "$DIR/share/applications"
-	cp install/pjpg.xml "$DIR/share/mime/image"
+	mkdir -p "$DESTDIR/share/SimplePanoramaViewer/"
+	mkdir -p "$DESTDIR/bin/"
+	mkdir -p "$DESTDIR/share/applications"
+	mkdir -p "$DESTDIR/share/mime/image"
+	cp SimplePanoramaViewer "$DESTDIR/share/SimplePanoramaViewer"
+	cp -r css "$DESTDIR/share/SimplePanoramaViewer"
+	cp -r html "$DESTDIR/share/SimplePanoramaViewer"
+	cp -r js "$DESTDIR/share/SimplePanoramaViewer"
+	cp install/SimplePanoramaViewer.desktop "$DESTDIR/share/applications"
+	cp install/pjpg.xml "$DESTDIR/share/mime/image"
 	echo "#!/bin/bash
-	$DIR/share/SimplePanoramaViewer/SimplePanoramaViewer \"\$@\"" > "$DIR/bin/SimplePanoramaViewer"
-	chmod a+x "$DIR/bin/SimplePanoramaViewer"
-	sudo chmod -R a+r "$DIR/share/SimplePanoramaViewer"
+$PREFIX/share/SimplePanoramaViewer/SimplePanoramaViewer \"\$@\"" > "$DESTDIR/bin/SimplePanoramaViewer"
+	chmod a+x "$DESTDIR/bin/SimplePanoramaViewer"
+	chmod -R a+r "$DESTDIR/share/SimplePanoramaViewer"
 }
 
 uninstall()
@@ -80,7 +87,7 @@ case "$1" in
 		print_help
 		;;
 	"-i" | "--install")
-		install "$2"
+		install "$2" "$3"
 		;;
 	"-u" | "--uninstall")
 		uninstall "$2"