# How to replace Greek letters from mathptmx with mtpro2 lite?

The Greek letters from mathptmx are horrible, some are even identical when they shouldn't be (rho and varrho for example). I'm new to LaTeX, so as simple as this task may be, I cannot figure it out. I want to replace all the small Greek letters from mathptmx with the ones you get from mtpro2, the Lite version (except for pi), as well as the infinity-sign.