Maintaining two Xcode versions in parallel on a Mac

Can we maintain two versions of Xcode (like Xcode 3.2 and Xcode 4) in parallel on a s开发者_StackOverflowingle Mac machine?

Yes - this works fine - normally when you install Xcode 4 if you already have an older version of Xcode it gets moved to /Developer-old and the new Xcode 4 installation goes in /Developer. Many people such as myself do this so that they can have both Xcode 3.x and Xcode 4.x installed at the same time.