Not sure what a "pre comp" diet is. But if you are an alcoholic,and trying to quit drinking,I don't think I would be going on a diet at first.
A lot of times when we quit,our appetites swing just like our moods do.
When i quit,I craved sugar to replace the alcohol i was drinking. I was eating a lot of chocolate cake ,and actually not gaining any weight to speak of because of the missing alcohol calories.
I would concentrate on breaking the addiction,and then when the dust settles work on losing weight. In a lot of cases,just eliminating booze,and eating fairly normal again will do wonders for your waistline,not to mention your health in general.
Just my opinion........ Fred