I probably a little late posting this but anyway an E65 usually means a firmware error, or it could even mean that the DVD tray is not properly alligned (doubt thats what is wrong here though).
Anyway, if it wouldn't hurt, I would try taking the NME chip out (or at least the voltage to where the chip isn't connected) so that you can test to see if everything still works normally.
If it doesnt work without the chip, you could have a number of problems. First off, depending on where you soldered your 5v point, that could be the first problem. If you used the 3rd leg on the top of SST chip (counting from right), check to make sure that is still in good form. Then, make sure the trace going from the that 3rd leg to the original 5v solder point is good. Then make sure that the brown cap right next to the 5v solder point is good. If all that is good, then you probably dont have a voltage problem. Good?
Then make sure that your point A to the SST chip is good, and that the trace leading from the SST chip to the other chips are good.
Also, it could be a firmware problem, but I doubt that the update would have done that because NME chips dont modify the firmware in any way, they just add to it. Seeing as how someone with a successful install doesnt have any problems playing TMNT, I doubt that is the problem.
If all that is correct, then classify me as stumped.