Mario Kart Wii Gecko Codes, Cheats, & Hacks

Hi, I'm new to this stuff. Have sorted my autistic sons CTGPR with no issues but now he wants the MKW Hack Pack and i'm out of my depth!
I have downloaded the Hack Pack and put it on my sons sd card in the riivolution folder. When turning on the wii and going to riivolution, the option to turn on the hackpack doesn't show. What am I doing wrong?!

Thanks in anticipation!

Sorry lads, got it sorted, not such a dumbo now!

I am actually happy to see parents being understanding of what their child likes and does. I respect you.