The reason the tutorials there aren't already in a file on the download page is because that area is for content that might change or expand and I don't want to have to keep it in sync every time it does (re-create the zip and post a new one). However, if you want to be able to read the whole tutorial, you should be able to view the source of the page and copy the section between <!-- DOCMANAGER DOCUMENT START --> and <!-- DOCMANAGER DOCUMENT END --> into another file (or just read it).