http://www.zbrushcentral.com/showthread.php?t=81506 this here allows you to press one button and bring your model into max with the polypaint on it as a texture,
AFAIK topogun is more for zbrush highpolys. It shouldn't be hard to make a lowpoly, imo it's the highpoly which is the hardest. But yeah there is no "do it for me" button.
No need to manually tweak verts in this situation. Just reset the cage (button in the Projection modifier) and then adjust the Push value so it looks good.