Neek20 is not easy to setup sometime. You have to test by yourself with different setup to make it work.
For me, I was able to do it working easily with a USB Stick and after I did all my test with the stick, I reproduce the same thing on a USB HD and it didn't work.
So I begin testing different things to fix it. I ReFormatting my whole drive in 2 partitions and I format my first partition in FAT32 Primary and active. I try it and it didn't work. After that, I just reformat the first partition with
FAT32_GUI_Formatter. It didn't work again. I reformat the first partition with
FAT32_GUI_Formatter but this time I unchecked Quick Format. It took 4 hours to format a partition of 500 mb !!! After that, it worked.
So I will say, do your testing and try to fix the problems.
For me, converting a HD with wbfs2fat, I don't trust that because it's like patching.
So do what you think is best for you.