Jim - thanks for taking the time to post your thoughts!
I will probably continue the walks, since the pace and distance isn't that great, plus I am an IT guy, so pretty much sit the rest of the day. Once I progress further with C25k, if it feels like I am not getting enough rest, then I can cut out the walks on the workout days.
I mentioned chi running, I guess I was mainly referring to trying to run and prevent heal striking, so as you mentioned, short strides, good posture, forward lean, etc. I will try and concentrate on, lets call it, good form, during this C25K program, and then maybe find a packaged running form to look at after that.
Thanks again!
Gary J.