Fred recommends you listen to each of the lessons twice. Right click over the links and click: Save Target As, or similar.
Lesson 1
Lesson 2
Lesson 3
Lesson 4
Lesson 5
Lesson 6
Lesson 7
Lesson 8
Lesson 9
Lesson 10
Lesson 11
Lesson 12
Or of you like the M4As they are here.