Uh, CDP downloads you can get from Trainz Pro Routes and US loco works.
CMP would not (and cannot) take down everybodys CMP, What version of Trainz do you have? (boot trainz and look in the lower right corner, does it say build 2.5 [non-SP1] or 3.2 [SP1]) SP1 will grately de-crease CMP's bugs.