Ah Christine,
I like Tony and I did have some upper body gains...I think you will enjoy the challenge. (I did have to add Cathe into my rotation ...I just missed her way too much

). I substituted as many people do...KPC for Kenpo X and Imax 2,1 for Plyo X (although, I really like Plyo X too..I just needed to add her in and I wanted some intensity). I also felt doing the same ab routine over and over again wasn't good either so the Coremaxes were frequentely substituted for Ab Ripper X.
While I was doing P90X, I didn't follow any food plan (plus I don't plan anything anyway) so I can't give you any ideas on that. I looked at the book once and said to myself........."OMG, too much work...looks like cooking to me....so skip this." If food preparation requires too much thought or preparation, I prefer not to do it

. I'm basically a pretty clean eater (whatever that means) nowadays. I had the recovery drink (still do somewhere in the pantry..lol), but I hardly ever used it while doing P90X (maybe three times??)...it was just way too sweet for me....I usually had a protein and a carb after the workouts (#1 ingredient in the recovery drink is glucose = just plain simple "sugar"). It just bothered me way too much to swallow 38gms of sugar even if it had protein, arginine, glutamine and creatine in the proper 4:1 carb to protein ratio. Pass the apple and nut butters....my teeth cringe just thinking about it. Anyway......
I love Sarah's idea with the HSTA...with the pull-ups between sets. It is definitely brilliant!!! (I can also relate to the need for a Cathe fix.) I ended up doing Meaner Legs because it was short every other week with Tonys Legs & Back to get a better leg workout in, but I like her idea better
Robin
ETA: Just want to wish you luck.