Highend – Download demo

Hi,

I have a site (www.ptmedical.pt) with too much information and effort to throw away.

But I really like the Highend theme and want to download the demo.

How can I do that without loosing the information on my site?

I´m creating a subdomain (www.teste.ptmedical.pt) and thinking about installing the highend theme, download the demo, build the site with the information present on the old one, and then tranfer the subdomain site to the domain site.

Is that possible?

Thank you.