I'll help

first off, you need Homebrew (HB) if you don't already have it,
next you need Gecko (this loads the game with codes)
if you already have those, then you have to set up your SD
I have a hacked-brawl GCT I can lend (normal brawl with hacks)
or you can DL a modded brawl GCT suchas B-, B+, BB, or vB
^my fav's Brawl- ^_^
anyways, those go in SD:/codes
next is the files,
these go in specific directories contained in SD:/wii/app/private/RSBE/pf/
(except for pfmenu2 which stays in RSBE)
char-hacks go in '.../fighter/*char*/'
stages go in '.../stage/melee/'
music goes in '.../sound/strm'
there's more, but I can't fully recall them... :/
if you have any Q's, let me know

I need all of this on my computer or on my wii?