Juice'in24/7,
According to the MIMMS (Australian version of prescription guide), Protaphane had no interaction with AAS listed but Humilin preperations does, also ACE inhibitors, B blockers, diuretics, limiting treatment if you run into BP problems. Both interact with corticosteroids (cortisol), HGH, thyroid drugs. I do not know how they interact, whether increasing effect, decreasing effect of each other etc or serious problems. All the anabolic agents had insulin in thier interaction lists.
Not much room for error, You sure you wanna do this?
You need professional advice. Maybe you should consider ***** but I bet even if you saw an endocronoligist, they will turn you away.