Hello Caroline,
I think you could do this using triggers but I'm not sure if that is what you would want. Each browser treats this differently. If you try this approach with individual files (see below), each browser is going to prompt you to download multiple files. You could zip these all into a single file to download and then create a single trigger to open that zipped file.
Anyway, just a few thoughts. Maybe someone else will come along with a way to do this but if you want them to download multiple files, I would probably zip them up and then create a trigger to fire when the timeline starts or when they click a button.
Richard
