I just put the scales from Dr. Geep into poser and that's exactly what I needed. Now I can see that my characters are the height they're supposed to be. Since it has "inches" on it, I am able to scale the guns to the right size.

Ok, so you can't change the ground plane...good to know (and strange that you can't).

I just need to be able to add the ability to edit/express my models face and I am good to go! :D

I really appreciate the help so far guys!