How to install: Katana
1. Start OpenIV 
2. Go to Grand Theft Auto V / update / x64 / dlcpacks / patchday3ng / dlc.rpf / x64 / models / cdimages / weapons.rpf 
3. Replace w_me_bat.ydr and w_me_bat.ytd

How to install: Damage and Effects
1. Start OpenIV 
2. Go to Grand Theft Auto V / update / update.rpf / common / data / ai 
3. Replace weapons.meta

How to install: New Icon
1. Start OpenIV 
2. Go to Grand Theft Auto V / update / update.rpf / x64 / patch / data / cdimages / scaleform_generic.rpf
3. Replace hud.ytd

How to install: Audio Effects
1. Start OpenIV 
2. Go to Grand Theft Auto V / x64 / audio / sfx / RESIDENT.rpf 
3. Replace melee.awc with melee.oac
4. Enjoy!