Saving these pictures onto your own computer is simple. Make sure you've clicked on the small "thumbnail" of the image and have the larger picture on your screen. Once you've done that:
Right click on the image. A drop down menu will appear. Bring your mouse over "Save Picture As..." and click (left click). A dialogue box will open, allowing you to save the picture anywhere on your computer or a disk.
Click and drag the image onto your desktop.