Welcome to the forum!
I have no idea, but it should work, logically.
I also have a question about uploading.
I'm thinking of uploading a family - 3 Sims in total.
Are the following facts correct?
1. I should upload them to the "Sims" board. (Obviously, but just to check)
2. If I upload them, the .sims3pack file will have all three of them in there.
3. It's Okay to upload multiple Sims in one .sims3pack file.
EDIT: 4. They're vampires. They will keep their vampirism when they are uploaded.
Are these facts correct?