I've seen a few screenshots of LS themes where the "documents" (like your 12/16 most recent documents that were opened are listed) are visible, how can add this into various themes?

- mrb

What do you mean, "visible"? Visible in a web browser? In a menu? As desktop icons? ...

Er, looking at screenshots of themes, where people have various popups open; one of them is invariably the "documents" popup that is available in the explorer shell.
I'm sure its easy to add that to any of these themes, I just don't know how.

Ahah, makes sense now. :) I think what you're looking for is something like this: