OK, at the risk of being repetitive, Poser isn't always very descriptive concerning error messages. In fact, Poser uses "out of memory" for too many error messages. For instance: 1.) If you are missing a geometry file, Poser first says it can't find the geometry file. You proceed, and Poser states you're out of memory. 2.) Insufficient Disk space is not the same as "out of memory." This error can mean: a.) Yes, I am really out of hard drive space (again, 1GB of hard drive space is not much!) b.) Poser is having trouble because it is conflicting with your Windows swap file. Two possible remedies: a.) The techie approach is to fiddle with your swap file settings. Many people agree that Windows XP is very good at managing your swap file and memory. b.) The safer remedy for me was to give Poser its own hard drive. I currently have a 120GB hard drive for Poser 4 and Poser 5. Windows XP and my other software are on the 20GB C drive that sometimes gets full. I rarely get the Insufficient Disk Space error any more. If I do, it's time to defrag the hard drive. The confusing part to me is that some people think they're "savvy" enough to fiddle with the swap file, but still don't see the difference between memory and hard drive space?!