Change display in member list

[sqzdog]

I am now requiring my members user names to be changed to their email address, since I use another package that requires them to use their email to log in. Currently, their name can be whatever they want, but I am going through all 150 users and changing their log-in to be their email address. That way it will be consistent for both sites I run.

Then, I am using the 'custom user title' field to put their real name.

The way the member list is set up now, it displays the username (which would show email address once I convert everyone). I would like to modify this to show the 'custom user title' field instead.

Any advice on how to do this?