Are you dissatisfied with only being able to create custom themes for your PS3? Does the fact you have to hear that weird click noise as you scroll through your junk irritate you? How about gaining the ability, upon leveling up to your next skill level, to make your own noises?
Lili-Chan Software has created a tool for just that purpose and it's yours to download. Now you can be as creative as you want -- from sneezes to some alternative clicking noise. The world is your oyster: go gut it, clean it, and eat the innards.