How to change scanned PDF type using Centreware?

We've got about 50 WorkCentre 7545's that we manage using CentreWare Web.  We need to change the default file type in the scan-to-file option to *non seachable* PDF's.  We know how to do it on each individual device using the WorkCentre's own web interface, but that would take a lot of time doing it one by one.  How can this be accomplished all at once using CentreWare?  Is it documented somewhere?  Is it even possible doing it with CentreWare?

Thanks in advance!

jim