Possible Duplicate:
Can I have multiple XCode versions installed?
Hello,
When I installed Xcode 4 GM version, I lost my previous xcode 3.
It looks like that I cannot use with Xcode 4 with Xcode 3.
Is there anyway to use them together?
In fact, I want to use Three20 framework in my project, but Three20 scripts have not supported Xcode 4 yet.