ubb6 doesn't scramble the profile fields, it just adds new ones... so your script may delete the extra ones ubb6 adds, but ubb6 should just update the member files the next time the user signs on... it sounds like fox still has not run the deletehacklines script if it is showing avatars for public names....
Make backups of your member files and run the script, then upload them to your members directory. Running the "update member post histories" after uploading the member files may or may not be needed...
Donate to UBBDev today to help aid in Operational, Server and Script Maintenance, and Development costs.
Please also see our parent organization VNC Web Services if you're in the need of a new UBB.threads Install or Upgrade, Site/Server Migrations, or Security and Coding Services.