Chris,
thanks again for your help so far, and I would be grateful for any additional light you can shed on this subject, as there are still some questions lurking around.
Pmedina, Alanclare,
the link below contains all the 50 individual Styles and 8 Voice files of the "S770" Brazilian Pack, zipped into a single file which you can download and unpack. It's rather small, less than 1 MB. From the "voice" files, 2 are ".liv", 2 ".lsf" (the Drum ones), 2 ".swv", 1 ".sfx" and 1 ".vce". Except for this last one, I have no idea of what the acronyms stand for, but all 8 files are 713 bytes long. Maybe Chris or other colleague can elaborate on that.
https://drive.google.com/file/d/1P3FnS8JdzAvrYuQrfP5E3Npci2oP3h9E/view?usp=sharingSince all "voices" were stored together with the pack Styles in the same keyboard folder, I would expect that, using Musicsoft Downloader, one could copy all to a named folder under User\Expansion in the target keyboard (of course, if it has the "Expansion" capability), bypassing the installation process, but I may be wrong. If the target keyboard doesn't treat Expansions, at least the Styles could be stored as User ones. In any case, some tweaking may be needed, as Chris pointed out before, if the keyboard doesn't have the original voices referred in the "voice" files.
I hope you succeed in putting these Styles to work and would be very interested in the outcomes, for my own education and for the sake of other members who may benefit from this. Please let us know.
Cheers -- José