Background: I've been getting into print & play card/tabletop games, and one thing I'm interested in is fan made armies for Neuroshima Hex. The hexes generally have different artwork and iconography for various abilities. I have a prototype hex file designed for easily making new hex tiles(it has the iconography in layers), and I have a layout file where the hexes are to be placed for easy printing.
Goal #1: I want to be able to save a new hex from my prototype paint file as a new layer in my layout file without opening or messing with the layout file. Sort of like batch processing in reverse.
Goal #2: And ideally, the layers would be automatically positioned according to a grid pattern I specify.
Are there plugins that would help with either of these, or that I could possibly modify to handle this?