Mass Update of Client Nickname 1

Hello,

We are using Timeslips Premium, Build 29.0.0.42.

Is there a way to "mass update" the Client Nickname 1?  We have used the protocol that clients that were not quite ready to become "Inactive" be renamed with a "Z_" in front of the original Client Nickname 1.  For example: "ABC_Client" becomes "Z_ABC_Client".  When the classification is changed to "Inactive", we wish to remove the "Z_".  Is there any easier way than manually changing each client?