Hide templates from front end selection

Hi,

The new blog templates plugin is really useful but I was wondering if it is possible to hide some of the templates I have created from users who are signing up?

I run a MU site using new blog templates + prosites, I like to create templates for both my free and pro themes, but when a user goes to sign up they are able to see the 'pro' templates.

I also like to build some test templates, these too can be seen on the signup screen.

It would be great if I could mark these templates as hidden.

Many thanks,

Conor