Adding multiple images to pyinstaller

Question

I’ve been trying to add images while using the onefile mode on pyinstaller, but I cannot seem to figure out how to add more than one file at a time. I also tried to modify the spec file, but once I modify it, I don’t know how to make that my default one for the program, as it generates a new one whenever I create a .exe file. Does anyone know a good solution to this problem? Thank you in advance.