1995 4cyl fuel injector replacement

Hey I was just wondering how hard it is to replace the fuel injectors on a 95 4cyl. My friend is asking me to do him a favor and I would like to know what im getting into before I tear into someone elses car. Pictures would be awesome!!

Im very mechanically inclined its just I dont want to start a project like the fuel injectors on a mitsubishi 3000gt are where you have to raise the motor.