How can I change the icon of the computer in the Finder sidebar (by default an old iMac, here named "Arnoz"):
http://img243.imageshack.us/img243/3980/picture1gf0.png
Thanks!
Ctrl+Click on app Icon you want, Select Get info, Select and press
c to Copy the icon. Next, go to the Finder sidebar icon, Ctrl+Click and select Get Info. Paste the icon you copied over the icon on the top left corner. Just select the top left corner icon and paste.