I always use photoshop and painter with UV mapper to texture I really don't like procedurals on my models. Usuing cubic mapping tends to give you too much unused space on yoru map. Try using a map from the Y axis don't split it. Then cut off the pieces that want to map from the Z axis. Set them aside. Remap the part you are mapping from the Y axis so it is split. Now you have a more workable map. I use layers in Photoshop and make lights with just a 4 pixel brush putting on dots or drwaing lines and deleting parts. Keep it in a different layer. Make the reast of yoru texture. Now after you have you texture ready open up your texture file in photoshop and hide all layers but the window layer. Set the color to black. You can use it as an ambience channel or as a transparency map and put soem lights inside.

The wit of a misplaced ex-patriot.
I cheated on my metaphysics exam by looking into the soul of the person next to me.