You need to know how to work with JSON files.
First open the SLAL json file (in data/SLAnims/json).
Find the entry for the animation. It looks like this:
Furniture Sex Framework uses a specific alignment for animations. The marker nifs in meshes/CityMarkers will show the alignments the animations need to have to line up in-game.
For most animations you will need to change the alignment so that it fits FSF's alignment. This is done by editing the sta