DOS? Aaaargh! Why would you want a DOS version if Poser is Windows & Mac? MartinC has had a look at the problem for me and it worked fine on his Mac. He also pointed out the obvious to me that I've got the Zygote frog with Poser 4. Duh. I've never used any of the Poser 4 animals and assumed the frog was on a Zygote special disk. It's now nearly 1 am so I'm off to bed but I'll have a go at investigating tomorrow.