How do you mod a Brawl Rom?

I was browsing this site http://forums.kc-mm.com/Gallery/BrawlView.php (A site with various SSBB hacks.) and I was wondering if there is a site or guide showing how to do it with your Rom or with the emulator Dolphin. I would rather do it this way then risking any harm to my Wii. (And I do own the game... My brother is playing it as I type this.) Many thanks in advance.