[Typo3] Sorting newloginbox userlisting by custom field

[Ben Chapman]

Hello!

We would like to use the newloginbox userlisting to list our faculty 
members. However, we need to be able to sort by last name. I used the 
kickstarter to extend fe_users to add last name (surname or family name) 
and first name (given name) fields. We can now display the information 
on our site like this:

http://www.law.emory.edu/cms/site/index.php?id=806

However, I cannot find a way to sort by the new fields created by the 
extension that added the two new fields to the database. I apologize if 
this is obvious to others, but can anyone tell me what I need to do next 
to get the sorting?

Best regards,

Ben Chapman
Emory University School of Law
ben.chapman at emory.edu