Well, the only problem I see with that, is that is a WHOLE hell of a lot of work. If you did all of that and also lifted heavy, my concern would be that you might burn up all your carbs and glycogen and that your body would eat up valuable muscle protein.

You mentioned you already do some other athletic activity, so that combined with Roy's work out and weight training could lead to injuries and unwanted bodyweight loss.

With that said, I do think you could get Roy's abs by doing Roy's ab work out 6 days a week.

What's more reasonable though?
(Keep in mind that Jones has never worked a regular job in his life, he has all day to train and rest)

I'd say if you kept up your regular athletics, and did half of Roy's ab work out 4-5 days a week, plus you trained your arms/legs/back/chest/shoulders in a split routine, you'd end up being one ripped, scary mofo.

As far as the other exercises Roy does, it all depends. If you want to be a boxer, sure. If you want to be more muscular than a boxer, I'd say cut back a bit of the cardio and eat/rest/lift heavy more.

In conclusion, I'd say take some tips from Roy's routine and add them to yours. If you find you are too tired at the end of the week, take something out of it (either from your athletics, Roy's training, or your weight training) and adjust accordingly. You may find as you get in top physical shape that you can add those exercises back at a later date, or you may remove them all together. Your body will guide you.

Good luck

Raven