I just came across this post. I have been using Rockettheme for years on and off now. I am a photographer and am tired with the canned sites out there so I am building my own now. I was using some of the free templates from Joomlashine.com.
I noticed that if we want a demo site setup we have to do it from a fresh install. I know with their templates I can load the template and in the configuration pull down the sample data which makes it just like their demo.
So I have my site I started tonight with a couple forms and stuff built, I joined back up tonight to work with the myriad template, the problem is even after applying the template it looks nothing like it should. So there is no way to get a demo look to work off of unless I rebuild my site now correct/