In the case of the content available to you in the SSY content catalog, there is no difference between Double Backgrounds and Covers. These files are sized to be used on anything the size of a hard-bound cover or smaller. You can use these images as the background on any yearbook cover (Saddle-stitch, Perfect-Bound or Hard-Bound), across any double-page spread within your book or you can use part of it as the background on a single page.
See the tab to the left that references the type of software you use for step-by-step directions on how to import content into your yearbook.
Instead of offering individual pieces of clipart, Studio Source decided that it made more sense to offer coordinated collections of clipart. When you look at these collections within the catalog they will look like this:
This is NOT what the file you will download will look like! The file you download will be a .zip archive that, when unzipped, will contain EACH of these individual pieces of clipart. This means that when you select the file above, you will actually be downloading sixteen (16) travel stamps in .png format. These individual .png files are what you will import and use as clipart into your software.
Simply download the entire collection and use what you desire. You do not need to use all of the clipart in a collection.