WordPress.org

1. Download and extract the Photos Flickr software archive from: http://downloads.wordpress.org/plugin/photos-flickr.zip
2. Install the plugins/photos-flickr directory from the archive to your WordPress wp-content/plugins/ directory.
3. Log in to your WordPress Admin interface. Visit the Plugins panel, and Activate the Photos Flickr plugin.
4. Within your WordPress Admin interface, visit Plugins » Photos Flickr and enter your Flickr User ID.
5. Install the themes/default/photos.php file from the archive to your preferred theme’s subdirectory within your WordPress wp-content/themes/.
6. Within your WordPress Admin interface, visit Page » Write Page to create a new page. Name it "Photos" and set the Page Template to "Photos".
7. Visit the "Photos" page you just created . . . do you get to access your Flickr photo stream? If so, congratulations! If not, please contact me.

You will likely want to "port" the photos.php file to match your theme. You will want to refer to the the readme.html file or browse online either of: http://dannyman.toldme.com/warez/photos-flickr-rtfm.html
http://dannyman.toldme.com/photos-flickr/rtfm/

If you arrive at a good result, and you are using a popular theme, consider sending me the photos.php for me to include for your theme. My e-mail address is: dannyman@toldme.com.