You get to Effects, Change Icon, then you can use your custom icons by typing in their path and filename, or search for them using the Browse button. Thus, if you extract your Whistler icons into a folder, simply point there from Change Icon, and they are available to use.
Also, to change your folder views, go to Windows Explorer,\View\Folder Views. When you have your folder the way you like it, you can set all folders to be like current folder. Enable the box to Remember each folders View settings.