public will_work() {
        URL u = new URL("jar:file:/path/to/pgjdbc2.jar!/");
        String classname = "org.postgresql.Driver";
        URLClassLoader ucl = new URLClassLoader(new URL[] { u });
        Driver d = (Driver)Class.forName(classname, true, ucl).newInstance();
        DriverManager.registerDriver(new DriverShim(d));
        DriverManager.getConnection("jdbc:postgresql://host/db", "user", "pw");
        // Success!
    }