Installation:
1. Unzip the file
2. Place DamageMult_P.pak into "[Steam Install Location]\steamapps\common\SWORD ART ONLINE Last Recollection\game\sao_lr\Content\Paks"
or
"[Steam Install Location]\steamapps\common\SWORD ART ONLINE Last Recollection\game\sao_lr\Content\Paks\~mods"

Known issue: Some areas will say "Cannot procceed beyond this point because progress is not normal." which means you haven't triggered a flag to access that said room, no idea where this asset may be at