OpenPS2Loader

I got OpenPS2Loader the updated version, But How in the heck PS1 and PS2 Games show up on the list

I'm using a Pen Drive, Optima Pro 2G, I formated with FAT32 on Windows 10, Just to test it out

I got 2 Games to test

Mushihimesama PS2 in ISO format
Einhander (USA) PS1 in BIN format

I tried just putting the Games in the Root, nothing

Then I saw it made CD, DVD folder

So I put the PS1 Game in the CD Folder
the PS2 Game in the DVD Folder, nothing still

Do I need the SUS in the folder of...

OpenPS2Loader