For zOOm
go to the administrator
menu components-zoom image adm...
third item (scan for new images)
first option (single (zip) file)
point location the zipper
choose a gallery
or
fourth option (scan directory)
you can specify a URL or a (FTP) path on your webserver
You can also try client-upload of zips with subcats with rsgallery on
www.rsdev.nl or seppie.info. Source of this component is on sourceforge