Actually it is. You can easily create a batch file that wgets for each URL.
My desktop platform is linux, and I can do some funky things just from the command line.
Unless you know the URL for each image, you are going to have to scrape the pages anyway, parse them for image files, and then download the files. Then you need to keep each page's file in a separate directory, so you don't have naming conflicts. Finally, you need to merge those directories and strip out the duplicates.
Yes, it can be done, but from where I am sitting, wget is a free and painless method.