Mike, BEG is correct, this is something if not done right, can really be a bad day---and can cause you problems later. Hire this one out...to someone who knows what they are doing? Depending on the width of the span and what is above,load wise, will determine the size of the beam needed, etc. Get you several estimates from reputable carpenters/contractors and maybe go with the one you feel comfortable with. Good luck and let us know how it turned out.