Riivolution is set up with a brawlmods folder on the root (base) of your SD Card. Inside you have Project M (projectm), Brawl Minus (???), Brawl+, BBrawl (???), and 3 custom slots - inside, you essentially have your "pf" folder with "fighter" - characters' files, "stage" and inside "melee" - stage replacments, "module" - porting rels and etc., and "system" - common5_en.pac (Character Selection Screen stuff) and common3_en.pac (Items), and your codeset - RSBX(E,U,J)01.gct goes in with the folders. Also make sure you have a Riivolution folder in Homebrew or the Riivolution channel itself! (oh yeah and .xml's for seperate mods (Project M, Brawl Minus, etc.) Have fun!

oh yeah and what that guy probably had is the Alternate Loader thing (it's coding)