Nintendo Wii: Having Trouble Launching Mario Kart Arcade GP and Mario Kart Arcade GP 2!

[_Gambit]

I've tried uninstalling the Quadforce wad through my Wad Manager program, but it refuses to let me do so, giving me a message that reads "ERROR! (ret = -1017)". It gives me the same message when I attempt to reinstall the wad as well.

You should be able to reinstall it by installing the Quadforce .WAD file with Canal WAD Manager again the same way you did the first time....

For your second suggestion: would you be willing to link me to a reliable walkthrough regarding this particular formatting process( unless you would rather walk me through it yourself?

1.) Insert SD card into your PC.
2.) Go to My Computer and open your SD card.
3.) Back up the contents of your SD card by copying all of your folders that are on your SD card and pasting them to a folder on your PC. This is a very important step because formatting your SD card will erase everything that is stored on it!
3.) After everything is backed up to your PC go back to My Computer and right click on your SD card and click the option that says "Format".
4.) Under the "File System" select FAT.
5.) Under the "Allocation Unit Size" select 64 kilobytes.
6.) Click "Start"
7.) When it is done formatting you can then copy everything back on to your SD card that you had backed up earlier to your PC.
8.)All done

And I've tried using the Wii Iso Renamer but all that happens when I drag the ISO file over the .exe application is a window pops up that allows me to open my desired ISO, but when I do so, absolutely nothing happens. Did I possibly install it incorrectly?

This program works differently then DiscEX.

What you need to do is:

1.) Double click Wii ISO Renamer v.3.exe to open the program.
2.) Click "Open ISO" and select your ISO file.
3.)
a)IF you opened Mario Kart GP 1 under where it says "New Gamename" type in "Mario Kart GP". And under where it says "New GameID" type in GGPE01. Then click "Save ISO"

b.)IF you opened Mario Kart GP 2 under where it says "New Gamename" type in "Mario Kart GP 2". And under where it says "New GameID" type in GGPE02. Then click "Save ISO"

4.) All done

If all else fails check out this guide- http://gbatemp.net/threads/custom-gc.../#post-4184775