Caulfield is a suburb of Melbourne, Australia, in the state of Victoria. It is in the Local Government Area of the City of Glen Eira, and South Caulfield is home to the former Caulfield Town Hall, the offices of the city. It is 11 km from the Melbourne CBD.

It is home to Caulfield Racecourse and the Caulfield campus of Monash University.Caulfield Park is a large Victorian garden flanked by Hawthorn, Balaclava and Inkerman Roads that features a war memorial, decorative lake and playing fields for various sports.

Source: en.wikipedia.org

After the installations, insert the followings code in your post or page to display your picture accordingly.

For a slideshow :

Example : http://nextgen.boelinger.com/slideshow/

For a album : [album=id,extend] or [album=id,compact]

Example : http://nextgen.boelinger.com/album/

For a gallery :

Example : http://nextgen.boelinger.com/gallery-page/

For a single picture : [singlepic=id,width,height,mode,float]

Example : http://nextgen.boelinger.com/singlepic/

For a image browser : [imagebrowser=id]

Example : http://nextgen.boelinger.com/2007/06/16/new-tag-picture-browser/

Read as startup : http://hqcode.com/?page_id=54

A further FAQ you can found here :http://alexrabe.boelinger.com/wordpress-plugins/nextgen-gallery/faq/

To integrate a widget into your theme manually, use the follow code in your theme:

For slide show: 

<?php
if (function_exists(’nggSlideshowWidget’))
{ nggSlideshowWidget($galleryID,$Width,$Height); }
?>

For random images :

<?php
if (function_exists(nggDisplayRandomImages))
{ nggDisplayRandomImages($number_of_pic,$Width,$Height); }
?>

For recent images :

<?php
if (function_exists(’nggDisplayRecentImages’))
{ nggDisplayRecentImages($number_of_pic,$Width,$Height); }
?>

Source: http://wordpress.org/extend/plugins/nextgen-gallery/