iZ3 Elite is a great icon theme for GNOME, originally a windowblinds theme created by Mr AzizNatour for his personal use on Windows.
All the credit goes to Mr. AzizNatour.
Download the file, extract the tar.bz2 from the zip and place on your desktop, right click on a free place on your desktop and then choose "change background" from the up Menu then go to "themes" and just take it from your desktop into this window. This will install the icons.
To share your icons with root, just write this in your shell as root:
ln -s /home/your_name/.icons /root/.icons