to use mods you need to make a mod foldure. to find the mod directory stary up sins, go to options, then mods, then click "show mod path". after you do this, make a foldure with your mods desired name, copy the reference datas "GameInfo" or your sins main cirectory "gameInfo" foldure into it, then place the modified files in that folder and go to the options/mods part when you start up sins, Enable your mod (it will list it), once enabled, click the option to launch the mod when the game starts, then restart the game. the modifyed files should work.