im new on a stock 1.73.502 att one x, and i whant to viper topic

i just buy on swappa one htc one x and it come with on stock ics 1.73.502, i what to unlock it and s-off to flash viper (my wife have it on her DNA) but like i say it my first time modding this one, can anybody giveme the steps to fallow to do this

thanks in advice