From reading the original post and the replies two things immediately come to my mind.
#1 - applying a combination of MSMA and 2,4-D is readily doable without non-target effects if mixed properly. A simple review of the labels obtained with the chemicals mentioned may not list a sufficiently clear enough mixing instructions as more than likely these are agricultural chemicals not intended or packaged for residential turf use.
#2 - while I understand the original poster had a question, it is one that is elementary in nature and had the poster a reasonable idea of how to properly mix herbicide the answer would have been known.
Regarding Ric's answer and responses given - I agree with Ric. Regardless of weither the intended use of herbicides is for personal/home use or not, a complete and thorough understanding of what one is about to apply is necessary. And if a question persists, call the telephone number on the label for technical assistance. So Kirk, according to your post Blake should have remedial training as well as supervision to reinforce what is patently a question any license holder should be able to answer. And if Blake is not a license holder, he should be as the non target effects of both MSMA and 2,4-D can be devastating when mis-applied.
As a final point, Kirk I too have adjunct experience at the under graduate level while mentoring graduate students in a specific field. A distinct purpose of a college education is not for one person to ask yet another for the answer, it is for the uninformed to learn how to compile a data set, process that data set, implement a specific course of action then adjust that course of action in order to achieve a desired result if at all possible. Had Blake been in one of my agronomy courses he would have received a less than favorable grade for this exercise.