If I was going to do that, I would copy prunethreads.php, rename it, and edit that.

Is there not a way to provide the values it needs through a script?

I'm going to take a look at the file and see what I can do.

The Stovebolt Geek
https://www.stovebolt.com/ubbthreads/ubbthreads.php

Server Information
UBB.threads Version 7.7.5
Release 20201027
Server OS Linux
Server Load 0.16
Web Server Apache/2.4.6
PHP Version 7.4.33
MYSQL Version 5.7.43
Database Size 1.85 GB