how to install two versions of xcode

I have one version of xcode installed in my mac and n开发者_开发问答ow I want to install the new version but I want to keep the old one also. How can I achieve this?

When I installed Xcode 4 it automatically went into it's own folder at the root level. To make sure when you are installing check the install location and make sure it is not /Developer if for some reason it is just change it.