Dot Porter, Curator, Digital Research Services at the University of Pennsylvania Library, offers 3 video tutorials that show how to download data and images from the OPenn and Digital Walters web sites. (The 3 tutorials appear below and you can also use this playlist link to access them as a group on YouTube.)
The first tutorial shows how use the Firefox plugin “Down Them All” to download all of the page images of a manuscript from the OPenn web site.
The second tutorial shows how to download manuscript data from the OPenn web site.
The third tutorial shows how to download manuscript images and data from the Digital Walters web site.
The Schoenberg Institute for Manuscript Studies 