Sorta. I am not ready to celebrate just yet. LOL! Let me see...
In the P-51D_1 directory... p51d_1 actually.... It has P51D.bmp and P51D_1.bmp. That's all I see.
what I would do if I was you....
take the folder of the 51d copy and paste.... name it p51d_1
now it has everything from the default and is named properly.......take the BMP image you work with start up a new image in your image editor of choice...use that as a base layer...create the new image using different layers for each aspect of the new image.......save it as the default image editor...IE GIMP is .xcf....then index it and save it as the BMP image....I would say use bright to get the best indexing but if its just to mess around, then its not an issue......
also the new files for the bump and specularity(sp?) I cant help with as I haven't messed with that yet.