Slo 04: I am unsure of what is considered to be safe with these injectors, but I know I have always gone with anything over 85% duty cycle to be hard on the injectors, eventually leading to failure or an uneven a/f between cylinders. I recommend you tune for 11:1 a/f, maybe 11.5:1, with injector duty cycle being no greater than 85%. At that point, if you are like me, and would rather give up a little smile factor, inplace of not worrying as much, I would back the boost off by .5-1 psi, just to be safe.
Then again, I come from a dsmer background, so those numbers may vary a little with this being a different car. I am pretty sure I am spot on though, with maybe the exception of the safe a/f.
Hope this helps. Boost on!!!