I have just discovered a way to use Riivolution file replacement on my 4.3U v2 Wii. Now I can play my hack in a real wii and see how my works are going in a "real" level, not emulated.
So, I'll tell you how to get it to work. It's very simple Step 1
Download Smash Stack: http://wiibrew.org/w/images/4/4e/Smashstack.zip
(Thanks to comex, to make all this work!).
After, backup your Wii SD data (to prevent data loss) and rename your "private" folder to "private.bak", so Wii and Brawl will not load it.
Extract the private folder to your SD root.Step 2
Download Riivolution 1.04: http://rvlution.net/riivolution.zip
, extract it to the SD root.
Now open the riivolution folder in your SD, and copy the file "boot.elf" to the SD root.Step 3
Grab any Smash Brawl template and put it on you riivolution folder.
I'm using this patch template: http://rvlution.net/riivolution/images/a/ac/SSBBtemplate.xml
If you'd like to use that one, you'll need to create a folder called "ssbb" on the SD root, and put all your desired hack files in there, without folders.
Example: Menu 1 music goes to /ssbb/X02.brstm, not /ssbb/sound/brstm/X02.brstmStep 4
With all files ready, now it's time to load it! Start SSBB disc without the SD on your wii and go to Vault.
Warning: Make sure that you don't have any custom stage on wii console.
Now go back from Stage Builder and put your SD on your Wii, and then, go to Stage Builder again.
You'll see a Twilight Princess patch screen with lot's of information and then, a pink screen for a few seconds. The screen will become black and it'll take you to Riivolution screen.