Caldina stereo

Hey i was just wondering if someone could help me with instructions to instal a stereo. I have a 1998 Toyota Caldina GT and its currently got the standard stereo in it. I'm am looking at putting a different one in but I don't know how to get the old one out. Can anybody help me?
All i reallt need a re instructions on how to get the stereo out, ie what bits of the interior do i need to remove and how... thanks