It's no difference about the zip files for fotolia. If they are zipped together in one archive, that doesn't mean that they are in a folder. They want to say that you shouldn't put them first in one folder and later to zip that folder. Just select the vector and jpeg and send them to one zip archive, after that upload that archive to cutcaster.
I'm not sure if they can generate jpegs, all I know is that I am uploading the same zip files that I use to upload to fotolia, with http, and they go without problems to cutcaster.
If you need more assistance, ask John, he will answer you quickly. Email him here:
[email protected]I hope that helps.
Robert