First you'll want to select a general category on the left:
You'll see the 
icon, indicating that the category will
expand into a list of items. Click on an item from the list:
Which will bring up a thumbnailed series of the images for that item. For a sales brochures, for instance, you'd see the cover on the left and successive pages to the right. For items with lots of pages, you'll need to scroll in the top window to get to all of them. Most items include a page count for you.
Finally, click on the specific page of the sequence you want to see:
Depending on your screen resolution and the image size, you'll probably need to scroll down in that bottom pane to view the entire image:
You can right-click on the large image, and choose Save Picture As (Internet Explorer; other browsers vary) to save it locally to your hard drive. Feel free to do so, but please don't repost to other sites or link to my images from your web pages.
I'm hoping that this new navigation, while somewhat complicated, is less cumbersome than the previous organization, and will allow you to scan through this information more quickly.