the hacks to questionnaire are relatively minor. I maintain our Moodle on git so they're easily applied. If you don't maintain on git you may have issues as questionnaire is very actively maintained and developed against.
I'm glad to send along the changes but we're integrating to 2.64 right now so exact line numbers are going to vary. I can send a diff when we're done.
The scripts are PHP code that runs from a new directory called 'ce' (course evaluations). I can send that along also but it too needs integration first.
Questionnaire works REALLY WELL for course evaluations. It is the first system our faculty have liked and we've tried a lot of systems.