No mate dont have it as your pre workout meal.
You want REAL FOOD as your pre workout meal. (then wait 1.5 hours then train). You can have it as your pwo shake if you want i guess. Or have it for breakfast or have it at work when you cant get hold of real food.
Never have any form of powder shake: 1. for your pre workout meal, 2. for your ppwo meal. Shakes are only a supplement, they can not replace real food because it quite simply wont work.
A common misconception in this board (and in gym etc), although im not saying that you have this misconception though miv, is that someone can use powder as a replacement to their real food, ie just have 7 shakes a day and no food, then they think theyll grow. WRONG!!! Powder is a SUPPLEMENT and should be used a max of 2-3 times per day. I eat 8 feeds per day, 3 of my feeds are shakes.
Perhaps the best gains (naturally aswell) came when i was approaching 20 years old and started to eat only 6 meals a day, no shakes or supplements just solid food.