allow multiple files in field group

Thanks.

Don't know how to do it!

The cenario is as it follow:
- there're events, and I created an item of type event
- each event has several languages, that most be created dynamically (via "add value") because there's no predetermined number of languages;
- each language has it's own zip file to be downloaded
- and each language has several audio files to be listed; this also must be set dynamically (using "add value") because there's no predetermined number of files to be listed

I've done everything until the last issue.

Any ideia to achieve this is welcome

Thanks