TOPIC: Avatar title in attendee list

How do you hide the avatar title label in the attendee list?

Does anyone know if the Yoothemes custom.css file will override the module css for DT Register? If not, what is best method for overrides so they are not lost during upgrades?

My registration questions are long and the attendee list headers showing these questions is not looking so hot.. ideally I would like a way to override questions and make short labels instead.

Example: Will you be coming to our event on Saturday? ----> Attending Saturday?