How do i change the cover on my sony ericsson w610i?

Hi people, i dropped my phone last week and the screen smashed, so i went on ebay and bought a new screen and a new cover. The cover came with a 'T9' screwdriver and a plastic opening tool. I dont know where to begin, taking the cover off. I tryed unscrewing the two screws at the bottom, but i dont want to force it open, incase i break it.

Any help will be greatly appreciated.
Thanks alot.