Ruby on Rails

I'm upgrading a Rails 2.3.8 application to Rails 3, but I'm a little
stuck: my old app name/directory is 4MyApp, but the "Rails new ."
command complains that the application name cannot start with a digit.

Is there an easy way to make the changes so that I can switch to a new
name and also make the internal changes that are required? I see this is
probably because a class name cannot start with a number...

thanks...jon

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