Define Blog Template using Signup Links with Blog Templates Plugin

Hi
I use Blog Templates Plugin to create templates using Multisite.

I'm wondering, What is the best way to have a registration URL specific to a blog template on while Signup .

E.g
I have a list of templates for Hotels, Resturants , etc

- If Visitors Selects to deploy Hotel site, When Deploy Link is clicked- The Hotel Theme is automatically selected.

Just needing to know the best way to achieve this.
Thanks heaps