First, go look up a hack that you want to download. May it be Nightmare, PikaMucha or Flameswor10's. Nightmare and PikaMucha's both come in compressed .DLL files which need to be injected. You can use Black Dragon Injector ot Portal Injector, completely up to you. And for Flameswor10's hack, it's just an executable. Just download it and extract anywhere you like. Finally just run it and click Load.