Okay, so...I did merge the files but now I'm doubting I did this right so I'm going to have to do a lot of research to figure out how the files are supposed to be and what animations are old, what's reworked, and what's new...
edit: I thought everything was fine but when I merge everything the Kamasutra animations don't show up in game but the files work individually so I have to see what's happening.
Its not so simple like that, Fin was able to do this because he already had knowledge how to create animation packages,
What I imagine he did was use S4Studio to extract the animation's clip and header files,
Then add them to the main package with S4pe,
Once this is done, the xml will need to be updated to include the info for them,
Its a possibility that the STBL files would need to be updated too for the names of the animations to show too.
Its not a small job and I don't think there is any automatic process like 'merge' or 'unmerge'. He was doing this by hand
Turbo tutorial for creating packages is probably best place to start,