Thanks again for the feedback. Best I have been able to tell, only the library files lend to the bog. Geometries and textures get called up as needed. The library contents however get loaded into system memory. To me this tells me I can shuffle things around a bit in Poser and improve performance by limiting how much content from the libraries Poser addresses at one time. Sounds like PoserBooost does this very nicely, so....is it ready yet? :O)