Okay, so I went ahead and downloaded all three parts of the pack, 7Zip and the Glide64 Plugin.
Installed the plugin, and then tried unzipping the files.

Now, when 7Zip is done, all I get is two .dat files. (ZELDA_MAJORA'S_MASK_HIRESTEXTURES.DAT, and the memory cache one).
Am I missing something, or am I supposed to only get these two files?

Also, I was browsing the forum to find a solution and saw someone saying that when they uploaded the pack, it would break, and posted a mirror to the OoT pack. Maybe this is what's happening to me?

Thanks in advance to whoever answers !