from brown to blonde

i want to go blonde, but how?!
i'm 15, and i have dark brown long hair.
the first time i dyed it, was right before my sisters wedding in october 2005. since then i have dyed it different shades of medium to dark brown 6 times. that first time was in a nice salon, by one of my sisters best friends. every other time has been by box. i have never been fully satisfied with my hair color, in the sun, in pictures, or in general. i just don't want to have brown hair anymore. i was born with strawberry blonde hair, and over time it turned to dirty blonde with a slight red tint. this drove me crazy, with my freckles, i did NOT want red hair what so ever, and that is still the case. about 6 weeks ago, i decided i wanted to go blonde. i saw ashley tisdales hair, and thats exactly what i wanted. golden blonde hair, with platinum highlights and dark brown roots and low lights. a friend of mine knows a very good stylist who will give me a generous discount. i just want to know HOW he might go about doing it without frying my hair.