Heres a link to the software but it isn't 64 bit capable yet...
https://www.stardock.com/products/iconpackager/index.asp

The latest IconPackager runs fine on my Vista Ultimate x64 SP1

It will run with and without SP1.

I sincerely hope you do NOT get IconPackager! For your sake, disregard this horrible and needlessly expensive, toy.. Not only does it NOT work it has hosed up my computer more then once when I attempted to try and change my icons using one of the sets downloaded with this program.. Once or twice I got it to change a FEW icons here and there, but if your thinking it will just nicely change all your icons on your computer with a quick press of a key, forget it, Hon.. Ain't gonna happen! Not only does it NOT change the majority of your icons it may often cause the rest of your icons to go blank or default to some other icon you may not even know you had.. I've seen several pleas for help regarding these problems all over the web and even here in Stardock's forum, but I have never seen anyone bother to answer them, especially not Stardock Central techs.. God forbid they should do more for you then give you some damn ticket number! Just take my word for it, you'll be much better off just manually changing your icons or looking for another batch change program elsewhere.. As for WindowsBlind, I like it and have never had any problems with it whatsoever.. Too bad IP can't be brought up to the same standard as WB.. If you do decide to purchase IP, all I can say is good luck too you..