mongoose
SOH-CM-2023
First I would use Gimp. Use paint.net to change the dds to a bmp and use that in gimp which is basically like photoshop. Now I have to relearn every time I use it as it's always a while in between and being an old geezer, I forget! However I seem to remember Andy was getting me to do something with alpha files so maybe you could see the help forum for gimp. I think that's what I did.