Incremental saves. Yeah, it burns up drive space, but every time I save I give it a new version number. I've had poser not save a scene properly many times. Just burn the provect to a CD when you get done. If your goal is not a large render, don't "render to a new window" That thing has always been cranky. Win 2K is probably the best platform for Poser. It has the NT stability and memory management with out all the XP ginger bread and security holes.