Rather than typing in paths into a textbox, which does not even 
autocomplete path locations, it would seem logical for the Icon Selection 
Tool to 
 
1.) have a button that would spawn a directory selection dialog that 
would point to the directory from which to load icons; 
 
2.) have a directory list selection widget docked into the side of the 
icon selector, giving on the freedom to see the contents immediately, 
without wasting time with a dialog box. 
 
As one can see, I clearly lean toward option #2.