Some earlier posts in this thread waxed ruefully about problems with file references which can arise when you move geometry or texture files to a new folder. I don't know what one could do about geometry files, but a great utility I found a year or so ago is CorrectReference1.1 by HogSoft (free license for single user). I organized all my textures into folders and subfolders (e.g., textures:hair textures:kozaburo) and similarly reorganized my figures and props. I then ran CorrectReference, which searched through my runtime folders (you can do just a subset of folders if you want) and corrected all the texture file references within the figure and prop files. It also listed the figures and props for which the referenced texture(s) could not be found, which made it easy to either manually repair or just kill the figure or prop if it was one I no longer used. I still probably have way too many geometry files and other vestigial stuff, but textures aren't a big hassle for me anymore.