--- src/main.cc.orig
+++ src/main.cc
@@ -542,7 +542,6 @@ 
   gtk_widget_set_name(win, "Msh_Run_Window");
   gtk_window_set_title(GTK_WINDOW(win), "Execute program feat. completion");
   gtk_window_set_policy(GTK_WINDOW(win), FALSE, FALSE, TRUE);
-  // gtk_window_set_position(GTK_WINDOW(win), GTK_WIN_POS_CENTER);
   gtk_container_set_border_width(GTK_CONTAINER(win), 4);
   gtk_signal_connect(GTK_OBJECT(win), "destroy",
                      GTK_SIGNAL_FUNC(gtk_main_quit), NULL);
@@ -654,7 +653,10 @@ 
   }
   else
   {
-    gtk_widget_set_uposition(win, prefs_left, prefs_top);
+  	if ((prefs_top == -1) && (prefs_left == -1))
+		gtk_window_set_position(GTK_WINDOW(win), GTK_WIN_POS_CENTER);
+	else
+		gtk_widget_set_uposition(win, prefs_left, prefs_top);
   }
 
   gtk_widget_show(win);
--- config/gmrunrc.orig
+++ config/gmrunrc
@@ -7,7 +7,8 @@ 
 TermExec = ${Terminal} -e
 AlwaysInTerm = ssh telnet ftp lynx mc vi vim pine centericq perldoc man
 
-# Set window geometry (except height)
+# Set window geometry (except height).
+# Top / Left = -1: Center dialog box in the current screen.
 Width = 400
 Top = 100
 Left = 200