This is very late application..
a few months ago, everyone talk about “How to change default email icon in blackberry?”
and now i make the application when everyone start using OS 5 Blackberry
This Application can help you to change Email icon with easy.
you just run this Application
change the icon
then reset your blackberry.
but somehow my application can’t work in blackberry with OS 5
Default Email Icon
If my Application not work in your blackberry, you can follow tutorial from this