Script Generator - Requirements module Primary/Secondary fields List rule customization

In the past I've created Primary/Secondary fields rules for the Defects module using the Script Generator - List Customization for Defects Module tool in the Set Up Workflow framework.

Is it possible to do the same for the Requirements module fields, i.e. add a sub, using the Script editor and "turn it on".

I went into the Script editor, and created such a sub (called it WizardReqListCust) similar to the ones for Defects, but this time using the respective Requirements fields. However, I don't know how to apply it, if it's possible at all.

I'll appreciate any feedback!

Thank you!