random category thumbnails?

[OjiBraids]

Can someone help me? How do I add a "random category thumbnails" section on a different page on my site?

I want to add a section like this on this page: http://www.dirtywrap.com/toomanystories.htm

..from this category: http://www.dirtywrap.com/gallery/index.php?x=browse&category=2&pagenum=1

[nicola]

that's what I'm searching too