I'll take a shot at answering your questions but I'd let Corn have the final say.
And in the original thread, we were all natural. Currently, I'm doing a variation of this program running Fina @ 37.5 mg ED and have gained 9 lbs in about 17 days.
Monday deadlifts are the Stiff Leg kind. That's cleared up further into the thread.
Overhead Press - If you're using a bar, I'd say to go in front of the head, taking the bar down to the eye/nose area. Any lower puts too much stress on the shoulders. Personally, I would HIGHLY recommend doing this with dumbbells.
Seated calf raise works a different muscle than standing. Try sitting on a bench, putting your toes on a 4x4 and resting some 45 lb plates on your knees. Be creative, but I think you need both seated and standing.
Instead of dips, maybe you could substitute incline dumbbell press or flyes.
As for diet, I only concentrate on getting enough protein. Everything else I just try to be healthy with.
Cardio - If you're going for sheer mass, I wouldn't do cardio. If you have more of a sports-centric type goal, try 2 days of cardio.
Corn, care to correct me on anything?