Are you talking about having a blank space instead of a text descriptor? That's fairly easy to do. Right click on the icon; hit rename. Then make sure Number Lock is on. Finally, hold down ALT and press 0160. Let go of ALT, and voila! You'll see it insert a space, which can be used in place of the text.
If you want to do it for more than one icon, insert a space (spacebar press) after each ALT+0160. So the second icon would have 1 space in addition to the ALT+0160, the third would have two, and so on.