For full instructions please carefully read the initial post and its inked posts. Substitute the [Only registered and activated users can see links. ] as the tutorial in post #1 refers to a much older version of NA but the actual method is the same. Choose additional files usually shown as suitable for 2xxx/3xxx i.e. 2xx5/7/8/9 & 3xx7/8 [not 2xx0/37x0] and specifically ASR '2' [not ASR '1'] files only if your unit supports Voice Commands.