Mates,
For all you guys who believe there's only one way to do it, the way you did, here's a short story.
In 1985 I was asked to meet a guy who owned a couple of King Airs and wanted to get his Private, Airplane Multi-Engine Land class rating and Instrument-Airplane rating in a BE200. Another friend gave me the, then current, FlightSafety Pilot Training Manual for the airplane.
I spent about 3 days in the manual and gave the guy his first lesson. Over a 4 month period I got him through the Private and Instrument-Airplane (we flew nearly every day, Monday through Friday) and he passed his ride.
I ended up as a Learjet/Falcon 20 captain there. Today he flies his Falcon 10 around with less than stellar first officers.
It can be done, in fact, it's done over and over again.
Cheers,
TransMach