I have previously spoken to the helpdesk regarding this matter. (June 2017) As I haven't heard anything further I thought I would post an idea here.
As a service we require to store GMP details as well as GDP details. Currently in R4 we can only store GMP details and use mail merge. Although we have come up with a work around for storing GDP details we are not able to mail merge. Due to the amount of correspondence to GDP's mail merge is essential!
It would be hugely beneficial to all Health Boards if Carestream could rectify this ASAP