My experience with the N64 emulator on Wii wasn't great.
If you have a modded Wii, you're better off installing the cracked Virtual Console games (.wad files). All you'll be missing are Rare games.
Have you install the homebrew channel?
The easiest way to hack our wii is to use the bathraxx exploit, all you need is a lego batman for wii, and sd card to copy the save to your pc to your. You can look at tutorials on youtube on how to use this exploit. That's half the battleno, im gonna look up info before i do anything.