This fun plugin stores files into a ZIP file. It is not
recommended for productive setups, and requires the commandline
Unix 'zip' utility to operate (DOS pkzip may also work).
prev << "db/dzf2"
next >> "db/rpc"

You cannot modify the README.plugins file, but anyhow any ideas or suggestion should as usually get filed on BugReports, UserSuggestions or even better the README.plugins.Discussion.