Generally speaking, changes to Jobs and orders should be done with the right BOs and methods. This ensures that all the Epicmagic happens in the background. To figure out how to replicate this, you need to first understand what BOs and Methods are needed to make the change.
Turn on trace logging and change the firm release manually. Save the record and then turn off tracing. Use Jose’s trace parser to find out which BOs and methods are fired, and what data is sent to the methods. Trace Helper Utility for Epicor ERP 10 - ERP 10 - Epicor User Help Forum (epiusers.help)
Once you have that information, then you can begin creating the BPM that will duplicate these BOs and methods. Create your UBAQ, and switch to Advanced BPM Update Only. This will allow you to create a new method. Inside the method you will add the BO widgets to call the correct methods.
None of this is trivial, but it is all doable. Good luck to you! Return with your questions and I am sure the fine folks here can help you along.