Integrating another binary
You can use objcopy to transform the binary image into an object file. The object file will contain symbols that can be accessed from C code. Then tell GCC to link the object file in and you can access the symbols in the object file using extern in order to load the data into the other IC.

Here is a good tutorial on how to link in a binary blob including how to file out the options you need to pass to objcopy using objdump.

And of course the objcopy man page and the objdump man page.