For the asm file you insert it with
Asar. It is for changing the "mario start" to "luigi start".
For the map16 file you insert it with this button:

. Make sure you are on page 0x3.
For the ExGFX bin file you just create a new folder in the same location of your hack's ROM. Then you put that bin in that folder. Now open your hack in LM and press this button:

. Now press 7 twice.
