@MustaviSadi if it's the original file of the same version as you're using it should be fine. But if you still have the original files yourself available in the directory just use that.
@Silentghost I've been playing it fine with no issues at all so far, everything the mod has to offer still seems to run smoothly.
When installing the mod you must select to install in "Game folder" rather than "mods folder". (This will really install it in the "mods" folder you created previously in the GTA5 directory whereas if you select "mods folder" it will actually create another "mods" folder within the already created "mods" folder -confusing I know). Just make sure you've copied all the necessary original files into the "mods" folder before you use OpenIV to install the mod.