itch.io

I gochu huzz but it is pretty easy

There is a tutorial, but it's outdated.
All you need to do is drag and drop the 
(drag and drop onto avatar base) onto the avi base. Literally the whole thing, but you do need to individually drag and drop the parent constraints onto the avi in the correct spots. VRCFury will do the rest (you have to check the positions to see if they're right) and then delete the throb anim from the menu.
put the dick in the output in the "penis" object, and set the in/out positions using the constraints. then that's it