Add a value to a multi-entry parameter

I need to add a SPCAUT value (*JOBCTL in this case) to multiple user profiles. I do a WRKUSRPRF *ALL and put a '2' next each one that I want to change, and then I type 'SPCAUT(*JOBCTL)' on the command line and press Enter and - guess what - it stomps over all the existing SPCAUTs for the selected users and leaves them with only *JOBCTL.

How, using this method, can I add an entry to SPCAUT for each of these users, without losing their existing SPCAUTs?

Frankly, in this case I can get around this, but that still leaves the question in my mind of how to Add an entry to a multi-entry parameter without stomping over the existing entries.

Not exactly a world-changer, but I am curious now.

We're on 7.2.

Thoughts? Thanks.

~TA~