First of all, brake pads don't make rotors crack, "cross drilled slotted" rotors crack because they've been weakened structurally. Chances are, you bought rotors that were cast as solid/blank rotors and then were drilled and slotted, which significantly reduces strength (and I don't want to beat a dead horse, but do some more reading on slotted/drilled rotors).

what kind of Hawk pads?
HPS-good street pad, dusts a bit, not very noisy, ok auto X pad, not at all rough on rotors
HP+ - better autoX/occasional lap day pad, dusts alot, but still works as a street pad to get your daily driver to the track, more aggressive on rotors than HPS.
Hawk race pads, blue/black - full race pads, not streetable, very aggressive on rotors