First off, this has nothing to do with #develop and probably belongs on another forum entirely.
That said, I don't believe there's any way to execute arbitrary commands over FTP (e.g. performing an unzip operation). If you're using SFTP and have an SSH tunnel, you could probably work out a way to do it like that since then you should (in theory) have shell access, and be able to invoke unzip, or something similar on the host.
Using only FTP, I don't think you're going to be able to accomplish this.