Dont know how to create Wiki page custom template?

I have a single-incsub_wiki.php in my theme but the wiki plugin does not appear to be generating the single page with the custom template. I saw that other people had similar issue but it had not been clarified/resolved since 4 days ago. I need to know what template file the wiki plug-in is using to generate the archive and single pages and how to make custom templates because I have a site-wide sidebar, but the wiki pages are not displaying the side bar at all (when all my other pages worked fine). These basic information really should be in a instruction/manual somewhere.

I am on a tight timeline, please advise ASAP.