From BioniX Wallpaper:
Flickr Mass Downloader is the ultimate tool that allows you to download millions of wallpapers from Flickr with just one click. The program will filter low resolution images for you. It is easy to use: just click a thumbnail to download or to view the image in its original size. It integrates in BioniX Wallpaper Changer so you can immediately display downloaded images as desktop wallpapers.
Features: Doesn't require a Flickr account; Search images on Flickr; Show results as high quality thumbnails; Show red border around low resolution images; Filter out low resolution images; Enlarge specific thumbnail with a single click; Download specific images with a single click; Download all images at once; Uses a high resolution resampler in order to generate amazing quality thumbnails; Displays downloaded images as desktop wallpapers; Keeps your system crap-free.
You don't have to install it in your computer. Just download it and run it. To uninstall it, just delete it. Monolithic: the Flickr Mass Downloader is delivered as one single EXE that you can put it on a stick and take it with you.