@AbdallahTerro:
Alright, I'm back! It turns out that all I needed to solve this little problem of mine was a new SDHC card with a higher capacity of 8GB( as opposed to the regular 2GB SD card I was using previously )in conjunction with unzipping the RAR files straight off of my desktop...
When I try to extract the files, a warning dialogue pops up telling me that the action cannot be performed because the files may be incomplete or corrupted. I trust that the files you linked me to are from a reliable source, so I have absolutely no clue as to what could be wrong here...
Alright, because I've already downloaded the DiscEX application and attempted to drag the ISO files I wished to convert over top of the .EXE file and all it did was open the config window for half a second informing me that "This is not a Wii Disc!".
In regards to the site page you linked me...
My "Games" folder( with the respective ISO files inside )is most definitely on the root of my SD card. I also downloaded the ISO files from a couple different sources but that didn't work either( what exact site is "DU", so I may check that one out as well? ).
And just in case it turns out to...
In regards to Tutorial 3:
I've recently attempted to add the Mario Kart Arcade GP and Mario Kart Arcade GP 2 ISO files onto my Wii menu in order to play them through the associated "quadforce" program.
I followed all the commonly-known, necessary steps that I had to online, from acquiring...