Googled for help, though thinking inside my mind I am the only Iphone developer wannabe who can't even find the shortcut to start the IDE, but haha, ended up, I am not the only one
With some tinkling around, finally managed to locate the Xcode in "Macintosh HD->Developer->Applications->XCode".
To make life easier for myself, I pressed the "Command" key, selected the Xcode icon and dragged it to the Dock (the bottom bar of icons).
