It’s meant to work on animating the skeleton - if you transfer the weight groups you can easily have any mesh display instead of the mannequin.
That said, it’s not intended to be utilized with other “characters” of differing bone structure, but it potentially could if the skeletal structure was similar enough to be preserved in the first place. The script aims to preserve whatever other “additional” bones may be included in the incoming “fbx” file, with the correct parenting and position.
The thing is, if you have any Maximo or other non inverted bone structure, you don’t really need anything other then the rigify plugin, so unless you created your own structure for whatever reason and now need to transfer ready to go animations onto the epic skeleton I don’t really see a reason to do all the work needed.
Just pushed another small update that I needed to push to be able to properly animate walk cycles. The next update, when I wrap my brain around how, will be to properly do the same thing for the shoulder positions, which cannot currently be pasted as opposite (due to the bone structure of the original bones).