Can't apply theme customization to sub-domains

Hi there.
So, I went in and customized Blogs MU for the main domain, but now I don't know how to apply the customized look of the theme to the sub-domains.

I can apply Blogs MU template to each sub-domain, but it shows with the default settings. Is there any easy way to get it to show with the customized settings? I've got dozens of sub-domains to add.
Thanks,
Sydney