You'll be fine. There were several of us with pretty outrageous splits (though yours may well take the cake) last cycle, and I think that pretty much all of us with significant work experience wound up at schools ranked a good bit higher than SMU (including a few T-14). Personally, I wrote a GPA addendum that basically said, "Yeah, I was young and dumb when I was an undergrad, but I've wised up, as you can see from the fact that I've gone on to lead a productive life since then." I wound up getting into every school I applied to, with full rides at a T2 and a T3 that I eventually turned down in favor of my current LS.
Good luck!