Hi! Welcome to the board!
ODD is NOT a lot of fun...I don't know about Dr Lehman's home treatment, but anything that costs a lot, sight unseen with miracle cures raises a red flag with me!
Many of us here have read and employed some of the tactics in Ross Greene's book "The Explosive Child". Many found that the tactics in the book helped, some did not. Either way, it gives great insight to how these kids think and what happens to logic (it's basically out the window!) and how to deal with it. My son is 8 with ADHD, ODD, and Asberger's Syndrome and we've made really great progress with his outbursts.
Keep your chin up! You've found a really great group (they've given me a lot to work with!) that have an incredible amount of information, empathy and humor!
Beth