To do this trick you need a third party file browser like Fileman , FExplorer , LCG Xplore etc (available in my downloads section)..Let's proceed...For example we are about to rename the MESSAGING icon.Go to your menu and move the Messaging icon on top left corner of your menu then open your third party browser and go to e or c:/system/apps/ and rename any folder.After renaming a folder quickly go to MENU then point the cursor to any folder and click OPTION before it refresh.You will notice that there's an option "Rename" now when the menu was refreshed it will point to the 1st icon which is the MESSAGING..Click RENAME.Now you have renamed an icon in Menu!