Do your own mouse driver as M-File via raw HID access. Version for "8-Bit mouse'

RawMouse.m

function [ dx, dy, sx, sy ] = RawMouse(devIndex)

persistent sx;
persistent sy;

if isempty(sx)
  sx = 0;
  sy = 0;
end

dx = 0;
dy = 0;

if nargin < 1 || isempty(devIndex)
   devIndex = 1;
end

PsychHID('ReceiveReports', devIndex);
reps = PsychHID('GiveMeReports', devIndex);

for i=1:numel(reps)
  rep = reps(i).report;
  if ~isempty(rep)
    if rep(4) ~= 0
      fprintf('FOO: %i : %i %i\n', rep(4), rep(2), rep(3));
    end

    dx = double(rep(2));
    if dx >= 128
      dx = dx - 256;
    end

    dy = double(rep(3));
    if dy >= 128
      dy = dy - 256;
    end

    sx = sx + dx;
    sy = sy + dy;
  end
end

return;