Kartmaker names sounds incorrectly when prefix is shorter than 4 characters
Attempting to generate a skin with a prefix of 3, 2, or 1 characters does not work. For the sake of example, let's generate a skin with the prefix "ME". S_SKIN's sound names are correctly filled out, DSKGLOAT is set to DSMEGL, and likewise for the other 10 sounds, but when Kartmaker assembles the actual wad it will cause all 11 sound files to have the same name: DSME.
Unlike with SRB2Kart, none of the sprite-related naming considerations apply here, and the vanilla Ring Racers cast already uses single-character prefixes, so Kartmaker should be able to generate skins with shorter prefixes.