I have the all files that were on my PS2 disc in a folder and now I need to make an .ISO from them. I have Nero 6 (burns cd and dvd) and I have DVD Decrypter. I no longer have the PS2 disc, just the files that were on it. How can I make a back up from these files in .ISO format?

WinISO
ISOBuster....(I think)
There's alot of stuff to do this, I use WinISO