Upgrading from 1.3.15 to 2.2.7 or 2.3

One more question.  I currently have an application on 1.3.15 and want to use the upgrade-shell.  Can I upgrade straight to 2.2.7 or 2.3 rather than the 2.0 branch that is generically mentioned in http://book.cakephp.org/2.0/en/console-and-shells/upgrade-shell.html#upgrade-shell.  I tried a quick run through of the instructions with 2.0.6 and ran into some issues with the upgrade shell.  I have not investigated the further but my app_controller was renamed to "<?php?".

Thanks,
Brian

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