I've used Poser on Win'98, NT4 and 2000, but as far as I remember this automatic list folding was only a feature of NT. The body part list used to do the same, which was also very useful. This is a user interface thing, I think, and Windows 2000 is more like 95/98 in that respect. It's the deep down stuff like hardware abstraction and file system security which are inherited from NT.