INSTALLATION: The easiest way to enjoy NextGEN Gallery is to login to you WordPress dashboard, go to Plugins >> Add New, search for NextGEN Gallery, and click to install. You can also download the zip file from this page and upload it from the Plugins >> Add New > Upload page.
HOW TO USE: Just go to a page or post and click the NextGEN Gallery icon. From our Attach to Post interface, you can create, manage, customize, and display your galleries. You can also manage your galleries and gallery settings from the central options area under the “Gallery” tab on your dashboard menu.