Custom shortcuts for selecting brushes?

i went to user preferences, 3d view, sculpt, then i scrolled down a clicked on add new, but how can i add a bush short cut? the existing bush short cuts look different than the one that i added. Any suggestions?

thank you, here was my attempt.

• I don't have a keyboard with a number pad. Do you have another work around. – Chris Ascencio Sep 26 '15 at 21:48
• I don't mean using numpad for that, rather than numbers just over the main keyboard (where letters are). Still, if it really doesn't work for you, you can create a new shortcut or edit exhisting one. – Mr Zak Sep 27 '15 at 16:32

Let's say you want to add your own instead of modifying the existing shortcuts. It's as easy as clicking "Add New", pasting in paint.brush_select, setting the Paint Mode to Sculpt, then selecting which Sculpt Tool you want. And of course specify the key, and the modifier key(s) if any.