Show status or progress while making 7zip archive

[yesitsmedoug]

I am trying to backup an existing install prior to an upgrade using Create Archive using 7zip compression. While this happens the installer appears to freeze which causes users to be concerned.

I have searched around and cannot find anything that describes how to show a progress bar, archive file size during the process. Is this possible?

The command I am currently using is:
Compress 7Zip Archive $BACKUP_FILE$ with recursive files $TARGETDIR$, using the 7ZIP algorithm (get result into variable BACKUP_RESULT)

Thanks