Multiple file selection from multiple categories

Hi,

I'm looking for a feature where front-end users can select multiple files to download as zip.
From what I see in your demo, the multiple selection is possible only inside the same folder/category.
Is there a way to allow users to select files across categories and then download a zip file at the end of the navigation and selection?

Also, Is it possible to display a custom thumbnail image for each single file? Is it possible to display a custom text for each single file?

Thanks!
Michael