How you download the texture hack (or model hack) and then upload it onto ur ssbb game? if u upload it onto ur ssbb, would it crash the game, or would would it erase all ur progress, including the trophy?
You're asking in the wrong section. You need to ask this in the 'help" section.
But I thought this was the Help section, anyway, to use texture hacks in your SSBB game you need the Homebrew Channel, Gecko OS, the File Replacement code and a SD Card to put the code and the texture you download. They have to be inside the folder directory private/wii/app/RSBE/pf/fighter/(name of character). If you don't know what any of this means let me know to explain further.
Downloading and installing Bannerbomb (http://bannerbomb.qoid.us/index.new.php) is the easiest way to getting homebrew.
To download apps, use the Homebrew Browser (http://wiibrew.org/wiki/Homebrew_Browser) or download them from Wiibrew.