INSTALLATION INFO:

For palettes, go into the Lethal League folder and go into resources/graphics/palettes/characters. There, you'll see folders with codenames on it, and for easy reference they mean:

boom = Sonata

candy = Candyman

croc = Latch

kid = Raptor

pong = Dice

robot = Switch

Regarding the numbers, go to 4 (for the singleplayer colors, haven't touched the team colors yet) and replace any of those with the palettes supplied. Right-click from the link and 'save as'.

For sounds, go to resources/audio/voiceover. The codenames are there as well. Extract the .rar files in the appropriate folders.