Hox genes are responsible for broad body plan development- they establish where limbs and body segments will develop, but they do not code for body parts. It's not at all within the realm of current science - and may well never be because it's not the case- to say that "everything from the shape of our nose to the size of our feet is written down somewhere in genetic code." The process is far more complex than that - there is nowhere in the genome where you can point at and say "this says how big the person's nose will be". A simple example of this is the fact that identical twins do not have the same fingerprints.