do you ever want to "pimp up" the style your Nokia 770? here is the way...
you will find the necessary pictures in the directory "/usr/share/icons/hicolor/scalable/hildon/". in this directory you will find many icons. Maybe, its the source for more costumisation...
read here what i did for changing the boot logo:
the boot logo is named "/usr/share/icons/hicolor/scalable/hildon/qgn_indi_nokia_hands.png"
you can modify or change the picture by any other pic, but take care that you name the picture qgn_indi_nokia_hands.png with the right resolution, format and color depth.
its a good idea to save the old logo eg: "qgn_indi_nokia_hands-old.png"
...plus midnight commander (MC) if you don't know your way around a Linux command line shell. You need to be "root", also. There be danger here for the unwary :-)