Multiple WP Blogs: Same Content

I am using a third party custom theme for a blog. The theme is from .


My boss wants to see the same content in two other themes. The problem is that there are many customization issues with each theme. I tried using a WP theme, for comparison, but lost all my work when I reactivated the ElegantThemes theme.

Can I create 2 subdomains each with a different theme?