Run xcode 4.6.3 and xcode 5 side by side

Following the following steps to run xcode 4.6 and xcode 5 side by side
1. copy existing xcode 4.6 to a different folder, for example /Applications/Xcode46/Xcode.app
2. install xcode 5 at the default location: /Applications/Xcode.app
3 when switching between xcode 4.6 and xcode 5, also need to switch command line tool to the corresponding version:

To xcode 5:
sudo xcode-select --switch /Applications/Xcode.app
 
To xcode 4.6
sudo xcode-select --switch /Applications/Xcode46/Xcode.app

To verify the command line 
xcode-select --print-path