OK, first, download an emulator and the original ROM for the game you want to get. EX, for MZELDA, you must have the ROM for The Legend of Zelda for NES. If you don't understand what a ROM or Emulator is, check it our here.
Next step, download SNES TOOL from our tools page (coming soon!!) and the hack you want (from the games page) After you unzip these, open up the SNES tool and choose combine. Pick the original game, then hit enter. Next, choose the Hack from the list and hit enter again. Now, the ROM file will have all the information of the hack you chose! ENJOY!
DO IT NOW!