TinkerTool should be nothing to be frightened about. I have 10.1.5 with TT, and have not any problems with it. What I did was adjust the font sizes to be smaller, and split the double arrows to opposite ends of the scroll bars. It didn't crash on me once.
What happens is you download TinkerTool (do a search on VT or Cnet), install and open the System Preferences. In other, you will find TT, and you can search through the different tabs and do a makeover of OS X to your satisfaction.