i just burned it twice now.
first, i only added the missing folders, that resulted with a DATA DISC by my PS3
second, i added the missing folders and also renamed all the files to their normal state(no 8.3) and it worked
so you'll probably have to make the 8.3 rename an option not a must, and since i didn't burn it with only the rename, i don't know if those missing empty folders are vital or not.