It works great in a scene, though how you intended to use it I'm not 100% sure.  It works on any object in the scene from my tests, so that's great.

Just as cool, though apparently overlooked:

Choose how you want to locate an object’s associated files. Poser 7’s Configurable File Search includes three levels of depth, Deep (for most extensive), Shallow or None, to give you the results you want – fast or comprehensive.

No more having to search for each and every texture map on a model or in a scene (unless you choose to do so), now Poser does the searching for you.