This might be a dumb question, but I had already installed the basic Joomla 1.5 package to my site with dummy content, got it up and running etc....
Then I discovered RocketTheme and got a membership.
I have found a template that I want to use and have decided to use RocketLauncher to deploy that template. I understand that it will do a complete new joomla installation, which is fine.
My question is, do I have to remove all the existing content and files (and databases) that I have already created or can I just upload the RocketLauncher file and let it overwrite what is there.
RocketLauncher is used for a new "fresh" Joomla install. It is best that you begin fresh by removing your previous install. If you are not sure what to leave on your server ask your hosting provider. A new database is also advisable.