I don't think there is a quick and simple way. If there is, someone please chime in.
First you are going to have to convert the icons into a .dll. You can use this free program...
http://www.becyhome.de/becyicongrabb...iption_eng.htm
From there you have to assign the icons to the shortcuts you want. You can do that with this program, but it's not free, $9.00.
http://s-k-tools.com/index.html?sksmgr/m_sksmgr.html
I don't know if there are any free programs to do this. I've never created my own shortcut icons, but once you figure out how the programs work it should be fairly easy to do.