WordPress.org

1. Extract plugin into /wp-content/plugins directory.
2. Activate the plugin.
3. Specify your code snippets in your blog post using the Usage Directions provided by the Google Syntax highlighter.

Here is an example to produce ruby syntax highlighting once the plugin is activated:

<pre name="code" class"ruby">
def my_ruby_snippet
  blog_post.should(be_highlighted)
end
</pre>