OK, I think I can make this work. Since I will be opening a batch of JPGs in PS with PM crops, I will have to send them all to ACR first, then do a "Select All" and then "Open" in ACR to get them into PS. Then do a series of "saves" in PS (I see an action in my future). I should then end up with a folder of cropped JPGs without the drag of having to do the cropping in PS (PM is much faster).
Thanks
-M