Batch download images from Picasa albums

I've always wanted to download the photos from my Picasa Web Albums. Downloading them one by one isn't really our style. At first, I thought about using ASP to parse the album's RSS feed and then output the real URLs so I could use Thunder (Xunlei) for batch downloading. However, the actual image URLs were stored within a namespace, and after searching for a long time, I couldn't find a way to read the data inside the namespace, so I eventually gave up. Later, I heard someone say that the English version of PicasaWeb once had a bulk download feature, but it was probably canceled later because it consumed too many resources. Out of curiosity, I checked the source code... and guess what? There really was a bulk download link; it was just hidden in an invisible layer. After all this rambling, here’s the specific method: