Inside and outside
the inside is mirror of the outside, so you have to make it and the alpha layer as well.
@Chris Stacey could you please confirm that the dds files regarding windows is sorted by the staff?
It's already been confirmed on here a few times already matey, yes the staff are doing the glass files for you. I did them for Steve Le Gallez (and you can see @Sam Smith did them for his designs) I would imagine those are fine but as you mention they are a little bit of a black art with the alpha layer, also I think there are dangers of people using the wrong typeface, etc.