Cooking for the P90X?

I'm about to start the P90X and I'm really excited about it but I am nervous about being able to follow the meal plan they give you. The choices seem so slim and some seem pricey; honestly I'm not the type to want to cook fillet Mignon for dinner on a Wednesday or something. Any advise on that? Also once I'm done with the P90X any suggestions as far as cookbooks for maintenance? Or cookbooks that are good for while I'm doing the P90X? And please don't misunderstand me, I plan on following their guidelines for servings and such but the same meals for 3 weeks in a row seems rough. Thanks to any good advise!