I get a note every time I try to import a website into any of my Scrivener; just plain-text can be placed in the draft folder? Is the research folder a “draft” folder? How do I move it outside - so I can have a dynamic page? And how do I zoom into the pdfs if I chose them instead?
In a brand new project you will see a manuscript/draft folder and a research folder. The manuscript/draft folder will be named manuscript or draft depending on what type of project you specified.
Manuscript/draft folder is the area that gets compiled and can only contain text document files (which can contain embedded (pasted) graphics and/or links to graphics stored elsewhere in the binder or outside the project).
Research folder can contain any kind of file. So that’s where PDFs, etc. would go. Scrivener has built in support for some file types, such as PDFs, not for others. Scrivener provides a right click option for launching external apps for viewing/editing such files.
In the case of PDFs, Scrivener provides a built in viewer… and one can also right click on a PDF and launch Adobe Reader (or other PDF related app you have installed). Hopefully one of those options will provide the zoom capability you are looking for.
Note that the manuscript/draft and research folders can be renamed, but will retain their functions and capabilities/constraints.
Hope that helps.
Have you had a chance to go through the interactive tutorial yet (in the Help menu)? It will explain the difference between the Draft folder and everything else. Briefly, this folder is a special area dedicated to the composition of what will become your final text. It will be used to construct the final exported document from Scrivener, and as such it is to be treated more like a normal word processor (everything is a function of the text, images are dropped into the text editor, etc.). Everything outside of the Draft folder is fair game for import (well, except for the trash can! 
).
The Research folder is a formal area for collecting stuff, but you can create your own top level folders and pretty much exert total freedom throughout the binder in how you want to organise things. It’s only the Draft folder that is special, since, as I say, it is used to construct a text document in the end—so free-floating web pages, pictures, PDFs, video files and so on really have no business in that kind of environment. At best we’d just have to ignore them when compiling, and that would probably result in more confusion than just prohibiting it to begin with.
On page 126 of the user manual, §14.3.2, you’ll find documentation on working with PDF files in Scrivener. There is an illustration of the toolbar which points out where zoom controls reside.