The best way (imo)....is to just take a obj cube into the (free) UVMapper Classic, create a "New UV Map>Box"

You can have total control how the image texture is aplpied to the cube, and you can acurately create a map to make (just) your windows reflective.

2 cents.

Contact Me | Gallery | Freestuff | IMDB Credits | Personal Site
"I want to be what I was when I wanted to be what I am now"