[Editor’s note: This trick works with the Trash too, and presumably any system icon — to change your Trash icon, open the Tracker in QuickRes and drag icons from other FileTypes panels into the QuickRes icon editor.]
BeOS R5 comes with a programmer’s resource editing tool called „QuickRes“ (/boot/develop/tools/experimental/QuickRes). After experimenting with it a bit, I noticed that opening certain system files revealed many familiar icons.
In order to change the BeOS logo on the Deskbar…

1. Make a backup copy of your original DeskBar! (/boot/beos/system/Deskbar).
2. Right click on /boot/beos/system/Deskbar and choose „Open With…“ | QuickRes.
3. Scroll down to the familiar BeOS icon in the list view and click on it. Below the list view, there should appear an Icon Editor quite similar to „Icon-O-Matic.“

With a little work, you’ll be able to make a custom icon to show all your friends!

Go ahead and poke around in the QuickRes editor to see what else you can hack on, but be careful — the Deskbar is important!