I might have the same problem as you, Prelude.
I have a v12 with Infinity v1.38 installed & SummOne's 1.8k resistor fix (68k resistors). Originals play fine & CD-R backups work fine. My DVD-R backup games (that work fine in my v9 PS2) are not working. They'll get past the Playstation2 logo screen & then either freeze at a loading screen or just have a black screen.
Any advise would be appreciated. Thanks in advance.
No matter how much Jell-O you put in a swimming pool you still can't walk on water.