Use the thumbs parameter of the [nivo] shortcode to use thumbnail images for control navigation.
Control navcheckbox must be selected for this to work.
Display a nivo slider for
- the attached images
- for the pages which are direct children of post 1426
- in a div spanning 70% of the available area
- and using thumbnail versions of the images to provide navigation through the images.
When a main image is clicked then the child page is displayed.