This is a 15 session ACT group manual for substance use issues that I've run in some UK treatment services. The manual provides a general structure for introducing ACT exercises and other addiction related treatment components (e.g., skills training), though we've always emphasised flexibility in delivery, and never slavishly following the manual.
This group was designed as a modular structure: Three modules of five sessions each, with a predominant focus on OPEN, ACTIVE, and AWARE.
I hope it's of use to people.
all the best
Lee Woodward