Edit: I finaly found it... Here it is: http://www.mediafire.com/?e8uj3a3ntfaarff
ratio.py
1.Put the file in the scripts folder.
2.Add a "ratio" line in your scripts part of the server's config file like this:
        "scripts" : [
        "welcome",
        "rollback",
        "trusted",
        "autohelp",
        "protect",
        "map_extensions",
        "airstrike",
        "squad",
        "disco",
        "antijerk",
        "savemap",
        "ratio"
    ],
			
				