Copy existing blog to existing blog (including theme settings, etc)

I thought about using the new blog template plugin since it seems to do exactly what I want, but here's the problem... I need to copy to an existing blog on the WP3.0 multisite install. In other words, I built a test site at beta.site.com and now want to copy it to the main one at site.com, which is essentially empty.

The new blog template only copies to blogs it creates itself.. .

I did the WordPress export and import but it doesn't get everything and a lot of it is theme settings, etc. that I need to be able to copy over.

Any suggestions?

Thanks
Ray