Well you can, and here's how.
- Download and theninstall SIMBL.
- You need the SIMBL plugin.
- Add the ColorfulSidebar.bundle to this SIMBL plugin folder:
/Library/Application Support/SIMBL/Plugins/ or
- You need to restart the Finder by one of the following
a - Logout / Login
b - Use the terminal kill the Finder and relaunch it: "killall Finder"
c - If you have turned on "Finder Quit', then just quit and relaunch the Finder, which is my preferred way
Then you get your nice icons