P90 Question about the Diet?

I got it today! I know there's a meal plan for it -- though it's not as rigid as the P90X. Do I have to stick to it to the T or can I just eat much more healthier stuff? I go to college and I'm on campus 12 hours at a time most days.. I can't carry the protein power and stuff with me.. but I can take protein shakes (like the Special K brand) and leave it in the fridge I have access to on campus. Will substitutions like this still give me a legit weight loss?
P90 Question about the Diet?
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