You might give this guide a shot. It is very safe and will update all your IOSs.
So I always see warnings saying things like "NEVER UNINSTALL THE IOS THAT YOUR SYSTEM MENU IS USING OR YOU CAN BRICK YOUR WII" or "DON'T MESS WITH IOS's IF YOU DON'T KNOW WHAT YOU'RE DOING"
And that is completely reasonable. My question though is there any way to find out what IOS my Wii system menu is running so that I know not to touch it? I'm asking this because I'm in the process of updating my IOS versions but I'm hesitant because I don't want to accidentally change a critical one that my Wii is running. I don't completely understand the whole multiple IOS thing very well but I have a basic idea.
My Wii is softmodded with region NTSC-US and it is running 4.3U
Any help would be greatly appreciated.