Well, looks like I too join the Level 4 Freeze family!
I backed up my retail copy of the game to the hard drive, as expected, it didn't boot. I applied the WAM patch and the I was able to boot the game.
However, on level 4, the helicopter level, as soon as I start moving forward in the canyon with the helicopter, the game will freeze and a very long, thin black rectangle appears in the middle of the screen...there's a blue thing inside it movie back and forth...
I had seen so many posts, but no one was saying exactly where it was freezing. Maybe this will help us out! Let me know where you guys freeze?!