Thanks to many members, especially Zorlon, I was able to succesfully mod my backwards compatible wii in order to play both wii and NGC games. Unfrotunately I noticed that many games that should work without a hitch do not work at all. I'll tell you more about the games that have problems as well as the ones that work without any problems.
The games that work fine so far:
Muramasa: Demon Blade
Sin and Punishment: Star Successor
Super Mario Galaxy
Super Smash Bros: Brawl
Tatsunoko vs Capcom
Sonic and Sega All-Stars Racing
Sky Crawlers
Mosnter Hunter Tri
Donkey Kong Country
Fire Emblem
Golden Eye 007
Fire Emblem: Radiant Dawn
Mario Kart Wii
Disaster: Day of Crisis
These are the games that give me black screens as I launch them:
Final Fantasy: Crystal Bearers
Las Story
Xenoblade Chronicles
Klonoa
Zelda: Twilight Princess
Zelda: Skyward Sword
Also Metroid Prime: Trilogy has a significant problem. After launching the game, I make it to the main menu, I can use all the menu options. Unfortunately after I choose Metroid Prime (The first game in the series) my wii restarts and sends me back to the wii menu.
Now to the details, I have the required ios files installed, otherwise I wouldn't be able to play the games I mentioned earlier. I use CFG UsbLoader 70r51. I softmodded my wii to 4.3E (It's a PAL wii) with modmii, but I usually use NTSC games, since I removed the region lock that is not a problem. I also use a western digital my passport 500 gb to play my games, so this isn't a hdd compatibility problem
I checked the installed ios files from my wii settings screen, and these are appearently the ones I currently have:
IOS222 Base: 38 hermes v4 (r4)
IOS223 Base: 75 hermes v4 (r4)
IOS224 Base: 57 hermerodries v6
(r65535)
IOS 245: not installed
IOS 246: not installed
IOS 247: not installed
IOS 248: not installed
IOS 249 Base: 56 d2x v8final
(r21008)
IOS 250 Base: 57 d2x v8final
(r21008)
IOS251: not installed
Of course I do not what do these IOS files do, but a member suggested me to install both:
d2x-v10-beta52-vWii
d2x-v10-beta53-alt-vWii
I haven't installed them yet, if you have any suggestions or any info regarding my problem please share.
Thanks in advance.