Its not intuitive.
I had a heck of a time trying to get a Poser head morph
into it to try to alter the mesh. I have been trying several free, trial and shareware programs and all of them within a few minutes I was able to figure out how
to do this. (Though with mostly dissapointing results).
I use RDS 5.5 and it is antiquated, slow and clumsy but it works.
In the process of trying to learn how to navigate the Wings interface to do what I wanted, the program crashed on me several times.
The help screen didn't have much info. So without spending
alot of time taking a tutorial I gave up.

Maybe if I have a few hours to spend I will download a less
buggy version and try to find a tutorial. But I'd rather be playing and learning to use my Poser 5 right now than to deal with the frustration of tryinng to get it to do what I want.

PS: If someone would be willing to give me some hints on how to import a poser .obj , resize, and get into the edit mode I might be able to figure out the rest..