Want to make a 'Free' version of my existing Android App
<p>I want to make a free version of my <em>existing and already published app</em> - I've seen suggestions that I make my existing app a library (by checking "Is Library" in properties) - then reference that library from a unique project for the "Free" version and then another new and unique project for my "Paid" version.</p>

<p>If I do this, both my two new projects will have unique name space/package names, which should  allow me to get past google's restriction of main package name uniqueness. However, will I have any other problems, such as updating all the existing apps that are pre-installed? Will all my current users have to re-install the new version or can I continue to upload a binary with a new name space to an existing app?  </p>
