Hi, I've done it. And in most cases it's okay. In my opinion, there is no slowdown-effect when loading a file. The compressionrate is varity (about 60-80% for the most files). But some items are not suitable for this. You have to try it. I load in, than save back with comressing, than i load in the comressed and testing, if it is okay. Sometimes, files have errors (e.g. Free MouseMobile, it has whispers, and my Poser can't load all whispers correct, if the files is compressed, I don't know why). It is a little bit work on testing it, but i can save about 5 or 6 x items in runtime, therefore, the compressing is helpfull for me. One disadvantage of the compressed files is, that you can't them open with a text-Editor. But that's a minor. I activate the compress-option often (also for scene-files). Regards