Freethewads seems to work well for me.
If you pop into Wii settings you shouild find your System menu version displayed at the top right of the screen. It's the bit where you set stuff like Wiiconnect24, Screen type and so on.
Normally trying to run and out of area wad will display a message that the game cannot be loaded or similar.
Installed using Wad manager 14.5 using IOS249.