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 and now want to copy it to the main one at, 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?