When I startet work on this plugin, the major drawback of NGG, as far as I'm concerned, was the minimalistic image chooser, which did not show previews of the selected images and only allowed to select one image at a time. So I've taken the liberty to adapt the existing excellent g2image image chooser, which also is embedded in the WPG2 connector to Gallery2.
After installing the plugin, you will find a new button in your visual editor:
After pushing the button, the image chooser opens. Depending on whether you select an album or a gallery, and which insertion mode you select, different options are displayed. This is the view you get when selecting an album:
And this shows the options when you select a gallery and the NGG image tag:
For more information about the plugin and to download it, please go to its Wordpress plugin page.