"Copy dsound.dll In order to load ASI plugins."

where is this file and where do i put it
, I feel like there is info missing here
it just says copy a file huh ?

Just placing a folder and renaming it to "mods" is not enough. You need to place the RPF files you modded inside the mods folder. Here are few examples.

totally confused by this part " RPF files you modded" but I haven't modded any RDF files so how can i do that ?