I don't know if I understand you correct but if you go to the application field where you can see all the icons, the first 5 icons you see in your shortcut menu if you want to change them just go to the button you want and push the menu button and that replace icon and "drop" it in first place, ect. When you go back to the shortcut menu you see the first 5 icons. Is that what you mean???
Just move the icons around in the main menu (where they are all showing) so that the first 7 (or whatever) icons are the icons that you want to show up in the L.