Sorry it has taken two weeks for this to be answered. I am sure it can be but you would first need to identify the exact animation your wanting to NOT occur. Second, identify the normal driving animation. MAKE A BACKUP OF YOUR ANIMS.IMG FIRST. If you screw up and don't have a backup, you'll have to reinstall the whole game. Again, BACK UP ANIMS.IMG.
1. Launch OpenIV
2. Navigate to animations.
3. Extract normal driving animation.
4. Rename extracted normal driving animation to reverse animation.
5. Insert your renamed animation back into anims.img
6. Rebuild and test.
That is the gist of it, the hardest (or shall I say most time consuming) part is identifying the animation. If you have simple native you can thumb through all the animation sets until you find it.
NOTE: I know there are some head tilt animations where the player looks slightly to left/right, that also function in the driving position. If you pinpoint on of those, you could replace the normal backup animation with that so it doesn't look like he couldn't give a flying **** whats behind him.
ADDITIONAL NOTE: Other players will see the normal back-up animation if they haven't done this themselves.