Create Wiki template with incsub_wiki.php

Hi! I've read through your forums about this issue, but it has never really been resolved! I have a theme with two sidebars - left and right from the main content. For the Wiki parts I want to have only the left sidebar show up and increase the width for wiki content area on the right. This I want to define in the incsub_wiki.php, which as I understand the file I need to create. I did it by adapting a copy of the single.php with a code variation to have only one sidebar.But now all Wiki functions (tabs, etc.) do not appear - it simply looks like a normal post. So, which code do i need to have the full-scale Wiki called up in my new incsub_wiki.php? Thanks for your help on this!