I am not sure what you mean by upload? I have downloaded them from the creator sims 3 studio and installed them via the launcher into my game ready for when my house is finished and they are showing up in the sim bin?
I think my simmies will be on extended vacations when they get somewhere as lovely to stay as a new resort-) I have replied to your questions on your thread but just so you are aware I think I am 7-8 hours ahead of you here in the UK so if you ask me a question and I don't reply quickly I will probably be in bed-)
soocoolsim is checking this out as well as she thinks there probably has to be a sim with animals to show up in the household bin which I imagine is probably correct as you would not be able to place a horse from the family bin into the world alone unless merging with sim family.. we will know when we get your upload-)
I have been playing sims 3 for years and never noticed these wonderful creators taking requests and now that I do know about them I visit their pages regularly and download all their lovely lots and sims, I have never seen such beautiful unicorns as the ones soocoolsim had made you and as my request is for a vamp/fairy mansion/gardens I have decided your requested unicorns are going to be in my moonlight falls.. along with the beautiful lot she is making for me which will be perfect in that world..
is she making you a sim daniel o'donnell as well? If so awesome. what world are you going to play your unicorns in?