> I've never seen a general gui file browser version of this. The hooks are there to do it though, at least in Windows Explorer and Gnome/Nautilus. Something v

> I've never seen a general gui file browser version of this. The hooks are there to do it though, at least in Windows Explorer and Gnome/Nautilus. Something very similar built into Windows with html file/folder groups and zip files. There are tons of third-party Windows Explorer extensions that change the way files are displayed. You can definitely create virtual nodes and hide nodes that you don't want to show (even in native open/save dialogs). While I have no doubt that it would be possible on OS X, I suspect that easy-to-use hooks are not available for Finder like they are in Windows Explorer. You can write a QuickLook extension for Finder though. (Some file browser extensions are easier to write than others. The image sequence in particular would definitely be easier to implement