Sorry for answering so late, you can drag the image straight from the post into the folder/desktop/zip/etc., but it wont be named correctly, so you'd have to rename it. It's probably easier to either click the link to open a new window and save it from there, or click the thumbnail to open the gallery type thing and save them from there seeing as it saves them as the appropriate name.
Thank you very much for responding. Great work on the textures, by the way. Everybody on the Isabella II FTB Team, keep up the fantastic work.