Will play with Tiger a bit to see about improving what the default icon is and see if I can get it to immediately download the item rather than having to click to see the icon placeholder again and then click again to download.
I don't think I would do that. Imagine an album with 9 images and a Word doc in the middle of them. The visitor clicks the first thumbnail, and looks at the photo. Then he starts hitting "next, next." In the middle of that, he's suddenly prompted to provide a location for a download. Probably not what he wants. Even worse if he's watching a timed slideshow!
What I would do, instead, would be to change the index page so that the
thumbnail for the Word document, if clicked, would prompt for a download location. Then I'd leave that Word document out of the slideshow entirely. No sense presenting it in a lightbox, since there's nothing to look at.
I know how I would do that in one of my skins, but I wouldn't know where to start in one of Laza's skins.