Add a booklet with turnable pages using the built-in WordPress gallery.
Yes, it's backwards compatible. In WP 3.4, you can assign the images an order to control their order, or you can simply specify their order in the shortcode per installation instructions!
Oh, and why the heck don't you upgrade to WordPress 3.5 already?
You can, but it won't work. :) The 'pages' of your booklet are comprised of ordered images only.
Maybe. Let us know how you think we can improve the plugin by posting your suggestions in the plugin's support forum.