Here’s a great step-by-step on using Firefox, Greasemonkey and Flickr to GeoTag your photos to use with GeoBloggers.com. Once you get the script installed, you browse to your Flickr image, add a new “geotag” and enter in a zip code. You’ll then use Google maps to locate a position and it saves the location data to the photo. Once that’s complete you can submit the image to Geobloggers. Link.
How to Geotag