Break Master Cylinder HELP!!

so i took my car to the dealer becuase its making this horrible noise...like when your brakes need replacement...breaks screech when i break and when i'm not breaking either...dealer told me the break pads are still good but that its the break master cylinder thats not holding the pressure anymore...they wanted to charge me $550 for parts and labor...me and my buddy are gonna replace it...he said were also gonna have to bleed the lines and that its a bitch to do that...i have no clue how to do it so if anybody could give me some pointers on how to do it and what is the easiest way it would be greatly appreciated!! Thanks!!

Just do some research into it. Shouldn't be too difficult. Definitely a learning experience and you'll have the satisfaction of doing it yourself.

http://www.2carpros.com/how_to/brake...r_cylinder.htm