Change an icon

Anyone know how can I set certain icon to be shown in network instead of real hardware's one?
All I found is about how to replace icon files on a local mac so it would treat remotes as they are but display my own icon. But while 3rd party mDNS implementations (netatalk, avahi) let me set which kind of hardware they are (so ANY Mac will show according icon), I couldn't find any place to set such in OS X native mDNS.
Any ideas?