If you have original menu.ml you can do that by yourself.Just open folder with icons what you want to use and change him names to ones in menu.ml (if you want for first icon to be "Play now" find 2 icons for that function and rename it to icon1_selected.png for big icon and icon1_unselected.png for small icon and do this for all 24 icons,just change numbers - or use .gif if you have gif icons but in that case you need to change .gif also in the menu.ml for all 24 icons )