Container code for home page

[Carbonize]

I wish to have a home page that relies on the User selected style.
eg - the home page shows no forum information, its just a welcome page.

What is the minimum 'container' code that I need to use for that?
eg - code to create same header / footer / style as the user selection in the forum.
The body text / images that I add to the 'container' would remain constant

All of the forum code resides in the /forum/ directory

Apologies if its been posted, my search terms revealed no clues

Cheers