If you have the Chunjae books, you can get by without an English teacher's guide. The chapter overview and such is printed in Korean only, but anything you need to explain to the students is printed in Korean AND English. Look for all the little tabs labeled "TEE." Each TEE section translates the Korean passage just before it.
I can read the game directions! Yay!
Also, here's a quick overview of Grade 3 chapters 1-8. I didn't have time to do the rest (or even get started on Grade 4), unfortunately, and my vacation started forty minutes ago.
(One significant early difference between these and the old curriculum: G3 learns "I'm Bobo" only. They don't learn "My name is" until G4's lesson My Name Is Minho. I also like that G4's chapter two only tries to teach 3 prepositions at once (in/on/under). Less overload!)