How can I use xcode 4 with xcode 3? (Three20 framework related problem) [duplicate]

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Can I have mu开发者_JS百科ltiple 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.

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Choose a different install location.