One of the crappiest thing about MP1 and MP2 is that it's not a fully 360 degree camera - I mean, you turn, max payne turns with you. So you can never see his face while running.

Games Likes Splinter Cell, Freedom Force are so much more immersive, where the mouse can be used to turn the camera 360 degrees and the wasd are used for movement by default.

Is there any mod that allows you to achieve the same result in MP1 or MP2 ?

The GFX would be so much better. I know there was a mod that achieved this result for Hitman 1 and 2.