My b2evolution Version: 2.x

The thing I'm trying to do is make a photoblog use thumbnails for prev/next links instead of the gray arrows. So far I've managed to get the arrow on either side of the title area instead of paired up on the right. The thing is when a visitor is on a "multi-post" page it acts like prev/next for multi-post pages (of course) even though posts per page is set to 1. Which means it is really like a single post page.

So! In single post mode (like after clicking a thumnail from mediaidx) my prev/next can easily know the previous and next item numbers, which means it won't be too hard to get the actual thumbnail for that item. However in multi-post mode (which looks exactly like single eh?) the URL has something like "?blog=12&paged=2" in it. That seems odd to me - showing the blog number - but what I wonder is does anyone know a reasonably clean way to get the item that would be shown on that page? Technically I guess what I want is the item_ID of the first item shown on a prev or next page, which in this case is the only item.

A head-start down the right path would be a wonderful thing!