From what I remember the files download as .7z files, which are compressed files to save space. Depending on your OS, you need to download a compressed file extractor (such as WinRAR or 7zip, and make sure it's from the official website) and take the wbfs file out of it. If you're using Windows, I personally recommend 7zip. Don't know about whether or not it supports Mac or Linux though.
Again, make sure you choose to download wbfs files, because .nkit.iso files don't work on wii loaders.
"NintenDON'T sue me please haha"
No I have not been doing that dont know how to can you give me steps please?? again I'm new to this so I just been downloading files off here an going to USB loader but nothing's showing up