They will calm down with age, but in the mean time, go to pet supermarket and buy a toy called Da Bird. I have one (of my 4 cats) that was on meds for spraying. I bought Da Bird 2 weeks ago, took him off the meds and play with him and he has only sprayed ONCE!! It really wears him out.
Have her watch 'my cat from hell' on saturdays on the animal planet also. She will get ideas from that show.