I've noticed the lack of proper Win/Mac compatible hi-res icons for all the custom scenarios that are floating around out there so I've taken the time to create some myself and I decided it's only fair to share them with you guys as well so here you go:
http://cl.ly/1c090g0Y1W0n
Hopefully you will find them useful - they come in ICO/ICNS format 128x128 & 256x256 px and are Vista/Win7/OSX compatible.