Index: nautilus-2.29.92.1/libnautilus-private/nautilus-mime-actions.c
===================================================================
--- nautilus-2.29.92.1.orig/libnautilus-private/nautilus-mime-actions.c	2010-03-10 14:59:13.000000000 +0100
+++ nautilus-2.29.92.1/libnautilus-private/nautilus-mime-actions.c	2010-03-10 21:55:06.000000000 +0100
@@ -1470,6 +1470,27 @@
 	g_object_unref (proxy);
 }
 
+void launch_gnome_app_install_mimetype(GdkScreen  *screen,
+				       NautilusFile *file,
+				       char *uri) {
+	char *qmimetype, *quri, *qduri, *command;
+	if (!screen)
+		screen = gdk_display_get_default_screen(gdk_display_get_default ());
+
+	qmimetype = g_shell_quote (nautilus_file_info_get_mime_type (file));
+	quri = g_shell_quote (uri);
+	command = g_strconcat("gnome-app-install --mime-type=",
+			     qmimetype, " ", quri, 
+			     (char*)0 /* NB NULL is wrong */);
+	g_free (qmimetype);
+	g_free (quri);
+	g_free (qduri);
+
+	//eel_gnome_shell_execute_on_screen (command, screen);
+	gdk_spawn_command_line_on_screen (screen, command, NULL);
+	g_free (command);
+}
+
 static void
 application_unhandled_uri (ActivateParameters *parameters, char *uri)
 {
@@ -1518,6 +1539,12 @@
 		goto out;
 	}
 
+	// try g-a-i now
+	if (g_find_program_in_path("gnome-app-install")) {
+	   launch_gnome_app_install_mimetype(NULL, file, uri);
+	   goto out;
+	}
+
 	/* Check whether PackageKit can be spawned */
 	connection = dbus_g_bus_get (DBUS_BUS_SESSION, &error);
 	if (connection == NULL) {