Like I said, I can't stand working with Photoshop. I'm working with GIMP right now and it just won't save it in 256bmp.
MS Paint destroys the colors when saving in this format. GIMP not but somehow when I want to save it it 256bmp it saves it in another bmp format... I don't know why.
Now I managed to save them in 256bmp with help from a friend who uses Photoshop. But when I try to convert it into a .spr file the last three images look yellowish like this....
Edit: I kinda solved the problem with the help from EL Dragon. I apparently used too old tools, he showed me the Act Editor and fixed the yellowish colors from the images. I don't know how to solve this stupid GIMP problem, but I'm really glad I can finish this sprite. So this problem is solved! Thanks.