This should work for you:
Download ResHack and unzip it [Google for "ResHack"]
Execute ResHack
Open the shell32.dll file with ResHack [found in C: -> WINDOWS -> system32 folder].
Open the Icon Group (refer to the screenshots)
Open 4 and 5:
scrn1.GIF
Right click on the "1035" (you might have something else - like 1033) below the 5 and select Save icon group: [save the icon to your desktop)
scrn2.GIF
Now, right click on the 1035 below 4 and select Replace Resource. Then select the icon you just saved to your desktop and press replace.
Then save the shell32.dll file to your desktop.
Go to the system32 folder, and change the name of C:\WINDOWS\system32\shell32.dll to C:\WINDOWS\system32\shell32old.dll
Then go to your desktop, copy the shell32.dll on your desktop and paste it into the system32 folder. Then restart your computer, and you should have new icons.
If you do not see icons, try to clear your icon cache.