If there are some other than standard bits that are available on these encased FOBs and you can identify what they are it can be customized in the SW.

 else if(o->hdwtype==3)  // custom version
        {
                o->hid_gpio_ctl         =  0x0c;        /* set GPIO 3 & 4 to output mode */
                o->hid_gpio_ctl_loc     =  2;   /* For CTL of GPIO */
                o->hid_io_cor           =  2;   /* VOLD DN is COR */
                o->hid_io_cor_loc       =  0;   /* VOL DN COR */
                o->hid_io_ctcss         =  2;   /* GPIO 2 is External CTCSS */
                o->hid_io_ctcss_loc =  1;       /* is GPIO 2 */
                o->hid_io_ptt           =  4;   /* GPIO 3 is PTT */
                o->hid_gpio_loc         =  1;   /* For ALL GPIO */
                o->valid_gpios          =  1;   /* for GPIO 1 */
        }