Currently there are 4 Postscript regions defined in the Alphorn theme, in the "section-content" zone.
I want to remove 2 of these Postscript regions, and make one Postscript region wider.
I can't find where the region divs are defined, so I cannot edit them either.

I've been looking in all the .tpl files, but there's nothing in there.
Any help is greatly appreciated, thanks!