I know this is an old post but the above post is no longer correct, I have been playing Max Payne I and II recently and these tricks are what worked for me.
Max Payne, is somewhat annoying as every-time the level loads you have to do this.
Hit F12 then type in (case sensitive)
Once you type it in correctly you can always just press the up arrow and bring back the command.
Max Payne 2, is a lot easier and you only have to make one config file change ever. Inside the Max Payne 2 directory there will be a file called "MP2_init.ras" , open it with your text editor of choice and edit this line.
DefaultFOV = 70
DefaultFOV = 85
The above will work permanently and you only have to do it once.
Both of these above methods I learned from WSGF
WSGF Max Payne Guide
WSGF Max Payne II Guide