I put this on my wishlist recently since it looked interesting, and I like interesting. :)

I'm assuming it's a conforming mesh - but is it a single mesh, or several separate items? And is there a well-defined "ground point" in your mesh, which corresponds to the point you would want to be at Y=0 after hitting CTRL-D?

You wouldn't normally drop a conformer to ground, it has to be said, just the base figure. Poser can sometimes get it wrong for the base figure, for reasons that (so far as I know) nobody has yet adequately explained, other than yelling "bug!" and running away. :D