That is a less automated than I want but just as importantly I don't actually know how to do it. All of my experience with Photoshop has been making adjustments to a single image rather than combining/stacking images. Any tips?
Open your first image in ps.
Double click background to change to normal layer.
Select the image with the Crop Tool.
Pull the bottom handle of the Crop Tool well down below the image - click Return or Enter. ( You now have a much taller image area ).
Make sure the Rulers are showing & pull a guide down to the bottom of your first image ( Make sure View - Snap To - Guides is checked).
Move your cursor to the Ruler origin ( the corner square where the eight & width rulers met ) & click drag the origin to your Guide.
Pull another Guide down so that it’s the correct distance below your first guide. ie. 1”
Drag & drop you’re next photo into the image - use the Move tool to position it against your guide.
Repeat as necessary. Use the Crop Tool to increase the length of the image area if you have to.
When you have all your images placed flatten the image.
I get Bart’s point about the file size possibly being a problem for the printer driver - maybe do all your soft proofing adjustments, sharpening etc & then save the file as an 8 bit jpeg?
I also appreciate Bart & Ernst’s comments about Quimage if you start doing this kind of thing regularly.
Graeme