You can download the program from Nivo Slider homepage. Click on the big button "Free Download" (or choose "Pricing" in the top menu). In the "jQuery Plugin" section click "Download". You will download an archive called "nivo-slider<version>.zip". Unzip the archive in a working directory on your computer.
To install a Nivo Slider gallery on your web page you need the following:
Then, create a HTML page like this:
In this example "ns1" is an identifier for this gallery. You can use any other value, just make sure that the value used in the "div" tag is the same as the value used in the script below the tag. The identifiers are useful if you want to have more then one gallery on the same page. (You should give each gallery a unique identifier, for example "ns1", "ns2" etc.)