FIXED TANGENTS FINALLY! GooD, I could kiss you. Honestly never thought I'd see that fixed, thank you very much for putting the time into it.
Normal maps technically have "worked" for ages, but any exported models do indeed have problems. Of course it doesn't fix the problem that 95% of the people who port models have very little knowledge about normal maps and usually leave the channels inverted that make them look awful/incorrect.
Have you/3Doomer had any progress with ODR in Max Payne 3 per chance?