Took 2 ir pics, one with auto wb, another with one-touch wb.
In Photoshop, drag one of the photo to the other as a new layer.
use quickmask/gradient tool (linear gradient), click on top of image and drag to bottom of image. Switch back to Standard mode and del off.
repeat with other layer, but instead of dragging from top to bottom, drag from bottom to top. resize and save as Jpeg.
Err...:what: Roughly like that, can understand? If not, I can do a step by step with pic...