I should start by saying that I'm not an instructor
My first intro to foot steering was a DVD call Go Snowboard. It has some pretty good instruction for turning, from beginner to advanced, all based around using the feet to control the board. Which I'm assuming is what people have collectively called "foot steering".
They highlight 3 elements:
- pressure control
- edge control
The steering part is where the term "peddling" comes from - as they liken it to one foot pushing down, as if on a peddle, while the other foot lifts up, in opposition.
I always thought their introduction for beginners was quite "technical", but the advice for intermediate and advanced turning is excellent.
I later found that this method seems to be the approach adopted by British instructors, which is where the interest leading to this post came from.
It's a while ago now, but I wrote a review of the DVD if you're interested:
Go Snowboard Instructional DVD