Origin of the rewrite rules

[captainedanjou]

Being new, I'm prepared to believe it's me, but the links to Peter's house rules and charts keep coming back as a non-existent attachment. 
I'm very interested in these because while I am sure I'm screwing up plenty of rules (my first PG game, solo, and I'm using 4th ed. for a scenario from Beyond Normandy), I'm also finding what appears to be more than a few holes and missing explanations.  I have some extensive experience editing rules, so I'm not especially new to the concept, but by the same token want to be sure I'm not just overlooking particular items.