Help!(Mario Kart Wii)

I need THOROUGH instructions on how to put custom track files on an SD card properly.
I already have Riivolution installed on my Wii but when I try to extract a custom track file on the SD card and load it, Riivolution loads but the custom tracks are nowhere to be found(It loads blank).:mad: Maybe i'm doing it wrong? Maybe I'm just dumb :confused::( I'd be very thankful if someone could help.
The person that helps me figure this out will be given any shiny of their choice that I can supply (legit).

Thank You.

Sorry dude I can't help... I'm a legit MK Wii Player. I don't like the potential damage this stuff does to your game.

I'm not quite sure what you mean. A file what now?

I understand what you mean, I would suggest wiping the SD card, (Deleting the files) or getting a new one.

what do you mean? iv never heard of anything like that