thanks for posting this up.
I tried this with 4.4 but failed miserably. using the Epic skeleton is really not an option for me because I used biped which doesn’t allow to change the bone hierarchies, and I need to be able to use all my existing animations from my UDK game 
it’s strange though that it makes a new version of every animation that you retarget. I was kinda expecting an intermediate thing that hooks your skeleton to the other skeleton and works on the fly using the same animation assets. making this process every time you get a new/updated anim package from the marketplace might be too time consuming 
anyway I’ll try it when I have some time (really want to set this up)