Hey Tony, thanks for getting back to me. I'm not sure if this is helpful or not, but it goes like this:
The trackpoint HID codes are Code 1 with values of -1 and 1 for moving down and up, respectively; this moves the mouse, but when the middle mouse button is held down, (HID 274, value 1), the movement for the cursor stops, and the currently-active window begins scrolling. Let me know if I've provided the correct info, otherwise, if I need to approach this differently, I can have another go to get better info. Thanks again!