Mi problem is:
I have this Multiblogging site: http://severus.es
Now, I would like to add a shop based in another WP theme: http://shop.severus.es.
I need to keep the functionalities of the shop (content) but I would like to visually integrate the header and the footer of the main site (http://severus.es) on it.
Switching off the header and footer is easy, the difficult point (for me) is how to make the functions get_header and get_footer to call the header and the footer of the main site and show then in the "shop site" so it get seamless integrated.