You can do it! VFX – aka developer Artur Leao – has relased mScrub: a commercial 3ds Max script that enables animators to navigate through animations with their mouse’s scroll wheel.
Using the wheel alone scrubs through the timeline one frame at a time; holding [Ctrl] as you do so moves in 10-frame increments. Holding [Shift] moves one keyframe at a time instead.
And that’s it. Simple, but something that mouse wheel junkies will really dig, and only €2 (around $2.60). You will need 3ds Max 2013 or 2014 to use it, though.