1. To fix GoDaddy domain and install Joomla, Gantry and customized theme. Files will be given.
2. To fix GoDaddy subdomain(same domain as no.1) and install Joomla, Gantry and customized paid RocketTheme(different than no.1). Files will be given.
I am a web designer and installing packages like Joomla and Gantry is a relatively easy task to me and I would be glad to help accomplish your desired goal.