>Dear All, I found the solution and tried it myself
>in summary, keep the minimum ISO to 200 NOT 100, maximum to
>whatever it suits you (3200 or 6400 or 12800, etc.)

The Videos you linked to were about a D700 which has a base ISO of 200. The D7000 base ISO is 100. I believe the intent of his suggestion from that video link was that while you set a maximum ISO via the Auto-ISO menu, you still controll what ISO you start at up to the maximum set. So again, with the D7000 you would be better served by using ISO 100 to start, and set the maximum to what you can tolerate noise wise.

Pete

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