MyBB Community Forums

I'm using an old Wordpress Header Integration plugin to have the same header across the site. I've managed to hack it into almost every function working but the Editor and Smilies don't work. The editor doesn't load, the smilies load but the do not appear in the post when clicked. I know my problem is connected to the Javascript, but I can't figure out which JS files I need to be calling from the Wordpress header to get the editor to load properly on the forum pages.

Can anybody point me in the right direction?

Editing to add: The quote button doesn't appear in posts, either.

forum url & test user account required so that someone can check the issue

PMing to you.