As far as I can see, it looks like you can use this "trick" to play them, but they won't be perfect (black bar)... Remember, the game is not converted, so you'll have to use a TV that can show NTSC.
Freeloader works better, though it still requires a NTSC-Compatible TV.
The websites that claims "No", is because they are written before the trick was found (because Nintendo have put a region-lock in the Wii) or because those who wrote it didn't knew about the trick.
Hope that helps.