I'm having a problem with the mouseover buttons though. I have edited the originals so they show my chosen colours but when I hover over the button in my preview the background goes black where the button is, despite the fact that there isn't a background and it's fine in the original image.
I have hopefully attached a couple of screenshots to show what I mean.
Any ideas how I can stop this happening?
http://www.smallscalelights.co.uk - LED lighting for scale models