Moving site to a new Domain Name

Hi,

Wondering if you can assist with the following:

We have developed our website at http://www.theperformancestudio.com.au.tmp.anchor.net.au and we have attempted with our hosting people to make this site our main site and replace our old website at http://www.theperformancestudio.com.au. We attempted this on Friday and failed so temporarily have a redirect on http://www.theperformancestudio.com.au.

I need to clean up the backend so that WP and the Theme is setup correctly for the Theme and also from and SEO perspective. Can you please outline what changes are required to make this happen?

Kind Regards
Yvette