Yep. The same thing happened to me too. I'm also using win98 OSR2 and just added my memory from 256 to 512 MB. Before adding memory, I can abuse poser4 and it works just fine. After adding memory, my poser locks up even when before rendering (such as rotating, changing texture, changing pose dials, etc). I have a slow system btw (PII 450, Intel SE440BX2 Motherboard, 256 MB SDRAM).