I'm not certain why this is such devasting news? A het pied female can be picked up for a very reasonable price these days. Why not purchase one and raise her up to breed to your het pied male?
Or do what I'm doing with my het clown male - I bred him to a normal, and I'm holding back all his daughers who are 50% possible het clowns (each of them have a 50% chance of carrying the clown gene) and raising them up to prove them out.
You may find this site to be helpful to you as you learn the genetics involved with different mutations and how they work. All you need to know is whether a mutation is recessive, dominant or co-dominant and that information can found pretty easily. I'm surprised that your friend who deals in multiple morphs isn't aware how recessive genes work, and pied is one of the more well known recessives.
The example in the link is albino, but it's the same outcome with pieds or any other recessive.
http://www.ballpython.ca/genetics.html
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