(Skuts)

Quote - If you are texturing an object with an avi, the avi will not be visible until the object is rendered.

Yes, that can be an irritating problem.  When using a gingerbread board or billboard, I'll sometimes temporarily replace the movie node with a targeting guide (JPG image map) so that I can see the image while placing/scaling the billboard.  Once you're satisfied with the setup,  you re-connect the movie node.
  This is the target guide JPG which I used for the pixie dust movie, for example:

I would place the billboard such that the tip of TinkerBell's finger is at the crosshairs of the targeting guide.  :D

Poser 12, in feet.  

OSes:  Win7Prox64, Win7Ultx64

Silo Pro 2.5.6 64bit, Vue Infinite 2014.7, Genetica 4.0 Studio, UV Mapper Pro, UV Layout Pro, PhotoImpact X3, GIF Animator 5