How can I create new sites using Blog Templates combined with Gravity Forms' User Registration

Hi!

I used the New Blog Templates plugin to use a default Template for every new site:
http://sitegeregeldconversie.sitegeregeld.nl/

It works like a charm .

Now I want my new users to sign up using a gravity form:
http://sitegeregeld.nl/site-maken/

After filling in the form, my new site is created, but without the Template.

How can I solve this? I can imagine that the solution is a simple hook/filter-thing!

Hope you can help us out .

Love from Amsterdam,

Sebastiaan van der Lans