M65, I usually spread mine out through the day. I don't like flax oil so I prefer to get EFAs from sources like olive oil, peanut butter, salmon, fish oil caps, etc... It doesn't matter how you get it so long as you get it. Just work it into your current diet. If you get around 10g of fat per meal then substitue a scoop of peanut butter for those other 10g of fat. I don't suggest eating it after a workout because it will slow down digestion and that's not what you want in a post workout meal.
I tend to split up my fat and carb intake so I don't eat fat and carbs together. Therefore I eat my PB with a protein shake or chicken or something. Again it's up to you and how your diet is. When I was eating fats and carbs together I used to have my PB on a slice of whole wheat toast. Somtimes I'd use low sugar jelly and have a PBJ sandwich.