When you change from Metacreations to Curious directories, most of the links within your library items and their respective textures is changed but not corrected within tose items (figures, props, hair, MAT poses). This slows down Poser seriously. This is particularly true of Poser5. You should download the free utility "Correct reference" from here and run it against those libraries that have textures and the utility will repair all those links, and identify all missing textures. You should use this utility for each new download from henceforth.

Gordon