Seeing that the file you have is a RAR file, that probably means you downloaded the game, which is piracy. You are asking for an ISO of a game... Which is also piracy. I give it a few hours till this is closed.
Also, RAR is a compression... You extract it not convert it.
I apologize. I meant extracted. But then I put the game on a dvd disk and still doesn't work on the wii. I'm using Wii Key 2 on my wii also. Still reading up as an error.
It's possible he owns the game but chose to download it rather than ripping it himself. If he had a very fast connection it would be quicker to DL than rip.
Not that I think for a minute that that is the case, just saying that its possible...
Anyway, you did extract the file before burning, right? If not then that would defiantly be the problem. Extract with winrar or 7zip to get an iso. If you did extract it then you want to burn it with imgburn. Sometimes newbies just try to use the windows default burning program. That wont work.
I extracted all the files in the folder and i got an iso that was 4,589,824 KB. I burnt it, put in the back up on the wii, and an error message occured.