Center Point in Entity

If its animated though you cant use meshwidth on it but could try this:

http://www.blitzbasic.com/codearcs/codearcs.php?code=1430

It loads an animmesh and scales it using blitz units.

tharefore if you make it 4,4,4 you know the center is
x+2,y+2,z+2

create a pivot at this point and parent the mesh to it and voila! a centrally referenced mesh.