From what I've read and understand, you use a clarifying sulfate shampoo before starting the CG method to give your hair a 'clean slate', so to speak, getting rid of any silicones or other non-CG approved ingredients in products that you may have been using. You can then start co-washing effectively.
Curl type : Boticelli, 3a, loose curls
Porosity : High
Texture : Fine/medium (I think!)
Co-wash/rinse out/leave in : L'oreal Full Restore 5, GFR&S, Schwarzkopf Bio Pomegranite
Gels : Umberto Giannini Flirty Curls Scrunching Jelly
Finish product : Boots Naked Style Frizz Fighter Serum or a pea-sized blob of condish smoothed over canopy
CG since Feb 2011