I've been using the FSP viewer for quite a while now, and it performs good (and offline, whereas PTGUI images can only be viewed online). The only thing is that a thin black line appears where the image borders itself. I read somewhere that you need to make the image 1 pixel wider in PS (add an extra line of copied pixels at one end), then shrink it again to 2:1. Would that be the correct way to get rid of the line?