I started stretching until I had at least an inch of growth. Each stretch I tried to go a little longer. But once I got my moisture/protein balance right and laid off direct heat until my hair was better, I didn't have any issues. I did end up cutting about 4 inches off, but I did that for aesthetic reasons - I didn't HAVE to.
You can see the pics from my damage to getting it back on track in my Fotki. It's in the first relaxed hair album from 2008/2009. You'll see a HUGE difference in my hair between July and August 2008. That was simply the result of following what I previously posted. Me and Aphogee shampoo and Keratin were joined at the hip for a few months.
Oh, I also didn't use Aphogee shampoo every week - it was too much. I alternated between CON Detangling and Aphogee shampoo weekly.