i dont think there is a dds plugin for paint. I dont think paint has plugins period. Get a photoshop trial. Unless you are talkin about Jacs Paintshop Pro.
paint itself doesnt have the dds plugin. if you are going to use paint for skinning (not recomened ) you need some image converter like convIm or something.
btw esm legend is me, but i see now that that name will be incredibly hard to type everytime i want to log in and wow ineed to get rid of that white on my sig