Any chance you could stop training for triathlons for a little while?
Post up your diet, because that will be the hardest part. You should be able to modify it to meet your needs. Post up meal frequency, foods eaten each meal, total calories, and the macro nutrient ratio. Fitday.com might help you out with that.
I think a program where you do a split might actually be good. That way you could balance each split with specific cardio. I'm curious to hear what others have to say.