Here's how to incorporate the Flickr Uploadr into your Adobe Lightroom workflow on Windows Vista and Window XP when exporting your images.

1. Install the Flickr Uploadr from Flickr's Tools site
   
2. Create a shortcut to the Flickr Uploadr (C:\Program Files\Flickr Uploadr\Flickr Uploadr.exe) in your C:\Users\username\AppData\Roaming\Adobe\Lightroom\Export Actions folder
1. Windows XP users should create the shortcut in C:\Documents and Settings\username\Application Data\Adobe\Lightroom\Export Actions
3. Select the desired images in Lightroom and choose File|Export... (Ctrl+Shift+E)

In the Export dialog, scroll down to the Post-processing section and in the After Export drop down, choose Flickr Uploadr:

Click on Export and when Lightroom has finished, all of your exported photos are loaded into a single batch inside of Flickr Uploadr and you're ready to upload!