The Nexgen plugin for WordPress is very nice and I know I will forget how to implement the damned thing if I don’t write this down, somewhere. Also, there is a shitpile of releases and they are quite different. in fact, the latest releases feature a slideshow which absolutely has problems in Explorer. I installed – I think – version 1.52 (I’ll check and update this thing) and it was da’ bomb! No slideshow but an incredibly nice Java display deal called “PicLens” – you can see it here: Nexgen with PicLens. Also, search this site for “HTML Museums” and you’ll find a large number of these versions – all the way back to 1.3.x.

When writing a page/post, you can use the follow tags:

For a slideshow : [slideshow id=x w=width h=height]

Example : http://nextgen-gallery.com/slideshow/

For a album :
[album id=x template=extend] or [album id=x template=compact]

Example : http://nextgen-gallery.com/album/

For a gallery : [nggallery id=x]

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

For a single picture : [singlepic id=x w=width h=height mode=web20|watermark float=left|right]

Example : http://nextgen-gallery.com/singlepic/

For a image browser : [imagebrowser id=x]

Example : http://nextgen-gallery.com/image-browser/

To show image sorted by tags : [nggtags gallery=mytag,wordpress,… ]

Example : http://nextgen-gallery.com/gallery-tags/

To show tag albums : [nggtags album=mytag,wordpress,… ]

Example : http://nextgen-gallery.com/albumtags/

To show random images : [random max=x ]

To show the most recent added mages : [recent max=x ]

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

And at least request your question here : http://wordpress.org/tags/nextgen-gallery?forum_id=10