I made my own
It is one Icon with ~10 Versions of it, in it ?!?
No Problems. Just drag both Files into Kindle root.
I have Windows7 and after RESTART it shows the Icon perfectly!!!
And if I change the Viewing in Windows to Details, List, Miniature etc. it shows up from 16x16 to 256x256
Take a look at it, for me it's Great!!!