I'd honestly suggest just doing one chest day (actually I believe CP has you pairing chest/back) per week.
Also, this is NOT a long term program. CP recommends switching to an "accumulation phase" (high volume, low/moderate intensity) upon finishing the 30 day program. It's incredibly intense and hard on your CNS, and trying to follow it for a prolonged period of time (if you're following it correctly) would most likely lead to overtraining in a very short period of time.
I have done this program and added 30 lbs to all of my lifts in just 3 weeks! I have also used this with several of my clients and they too received similar gains (30 lbs in 3 weeks actually seems to be about average). But, I personally stalled out in the 4th week and found that in most cases this is the case. Perhaps CP's super genetic freak athletes can continue to progress for the full 4 weeks, but unless you fall into that category you may not.
Either way I'd suggest discontinuing the program when you stall out (like I said will probably be around 3 weeks).
Also, I believe that CP mentions this in the program, but I haven't read it in a while so I'm not completely certain. But, the way I did the program (and the way that I took CP as intending you to do the program) was that I added weight to my second and third 1/6 waves. This averaged out to about a 10 lb increase in both my 1RM and 6RM in each workout. I would then use my new 1RM and 6RM as my starting points in the next workout (thus leading to a total of 30 lbs of strength increase in a 3 week period on every lift).
I will also say that I agree with what others have said in that the program is awesome for strength increases, but I personally didn't gain much in the way of muscle mass during the program (though I'm sure the increased strength helped me add muscle during the following mass/accumulation phase).
Hope this helps.