If you used Windows' default file extractor to extract the .zip of the hack, it'll corrupt the file names, resulting in the long and convoluted names you're seeing in the HANS folder. For me, WinRAR was able to unzip the hack without corrupting the file names, so I'd try re-extracting the .zip that way instead. I've also heard people say that using WinRAR still gave them corrupted file names, though, so you may have to find some other program to extract the hack with. The ROMFS extractor is only used to extract the ROMFS from your dump of the game-- you can just use a standard archiving and extracting program like WinRAR or 7zip to extract the hack.