Just a thought but if he can't get Soundhax to work for unknown reasons, wouldn't he be able to use cart-based exploit to get into Homebrew launcher because he has Sky3DS? I recall reading something about you being able to use Sky3DS for any cart-based exploit. Sadly since the cart-based exploit guides are removed from the 3ds.guide someone more experienced should comment on the knowhows if he opts in for that method.