Where to start with this one....
Google .upo and this thread is up as the 4th result. What is the meaning of this goose chase and why? Can't import into Unity as they are to have a butchers and have no idea what kind of compressed file this is.
Have you purposely made this file difficult to open with vague answers and want to keep the models hidden?
It's not just a renamed unitypackage? Maybe pro only does .upo. I'll just keep guessing. 
I can see the job this is going to be for you trying to convert this process into help, good luck to you there and maybe it is best for most people to stick with Milkshape anims using the model direct from FP, but even then I think you're stuck with one animation. Got head in the clouds again and did create a few animations for this one model.
IEnumerator LoadBundle()
I think this kind of method from AFM ^ is what I was after the other day to load smoke prefabs.
I'll try create a REALLY basic class tomorrow and attempt to import my unitypackage (animated models) with this and see how it goes. At least in unity I can see what's going on and access my animations there. They work, so half the battle is won.