How can we add wordpress templates into the new blog template plugin

I got the solution for live site with the selecting theme as per your answer .i installed the new blog template plugin and configure it.This is the same plugin which i want but i am unable to understand how can create new blog template by using wordpress template eg. i want to add wordpress template when creating new blog template but it needs blog id or blog name.what should i do if i want to add some wordpress template?