Editing a pre-existing WW animation

[Clusterrust]

Hi fine people,

 

First post here, I hope I didn't choose the wrong section. As the title says, I am trying to modify an existing WW sex animation, the animation in question is called "brelldyfuckx" (a reverse cowgirl mf animation) by the animator "awesome". I wanted to make the legs of the female more widely open, and I also wanted her to be on her tiptoes during the entire animation. I tried following tutorials and I managed to export the animation and edit it in blender, the problem is that I get a bit lost with these tutorials and now I don't know how to import the edited animation into the original package file created by the author, replacing the original animation. Any help would be greatly appreciated, thanks in advance to you and to all the people that created WW and all of its content.