Would it be possible...

was thinking if I did like an after years chapter style thing. And had each chapter as its own dl(ff6 rom) would there be a way I could transfer save files from one to the next?

It is possible I believe to expand the SRAM to have more save file for your different scenarios. I'm not sure however how it would be possible to add together every scenarios SRAM data into the final chapter SRAM. Do you have a really good ASM language knowledge?