Best of luck to you.
BFL is a great program and there are some really good recipes. I did not care for the heavy reliance on protein powder and meal replacement bars (times may have changed that, it has been awhile).
Yes, I would substitute the cardio part with biking. Again, best of luck! Keep us updated.
Jennifer
“Live as if you were to die tomorrow. Learn as if you were to live forever.”
-Mahatma Gandhi
"We are what we repeatedly do. Excellence, therefore, is not an act but a habit."
-Aristotle