I missed 1 file from the Vanilla-osC package admin/includes/functions/html_output.php

Apologise to anyone using this on a Vanilla install but if you get the error "Fatal error: Call to undefined function: tep_hide_session_id()" you need to do Step 8 of the instructions and add the function to admin/includes/functions/html_output.php

This is a Full Package with the missing file now included.

More...