Before it is implemented in the firmware, you could do that with an external device: a simple Arduino connected to the PanelDue port, sending a pause command, triggering you camera, then sending a resume command.
I have a second question,
How s the sequence of the toolchange files, i think there are 6 files, but i have some issues there also, and i don't find a clear explanation about is.
Look at the section "setting up the tool change files" of this documentation link.
