IIRC the MS dash gets "skinned" by replacing files on the C partition with alternate creations, no utility to make this a menu driven process. Never done it but I did find replacement files once. I would expect that wherever the files were downloaded from there should also be a tutorial (or readme, or nfo file, etc.) with how to use them.
You can also change the sound files as well I believe.
-Whoopin'
