I am looking for a solution to produce a two-column(ed) LaTeX-based photobook. Text and comments should go on the outer column (in a two-sided document)–something like a wide outer margin. Photos (along with their optional captions) should be placed in the inner column (which will be wider than the "text"-column).
Very important detail: the idea is to have landscape pages, wide enough to present photos that can be actually seen.
As an extra, the class should be compatible with some kind of a thumb-index for the chapters, placed on the outer side of the page, from top to bottom, counting from the first to the last chapter.
Should I start scratching my own class (or layout for LyX)?