Car radio/stereo removal

Hi, I'm looking to remove my old car radio and install a newer aftermarket one simply because I'd like to have an auxiliary cable available. The car is a 1998 Corolla Hatchback. Australian version. It seems the same year model in America was different and that's all I can find when looking for tutorials online. I've had no luck in removing it so far. Here are some images, after removing the air con vents I uncovered some bolts. Removing these seems to be the way to go. I'm going out now and will return to my project tomorrow. Any help from someone who has done this before would be appreciated.

http://imgur.com/MxmMJSx http://imgur.com/RPBcWSV http://imgur.com/1u1BLJN