Camera Angle script..?

So far, on ROBLOX, my games have NOT been successful.. I'm trying to change that by creating a new game loosely based off the Metal Gear Solid series. (MGS)

In the game, you are allowed to switch through two different camera angles, first person, and a overhead view, like this.

First Person: http://ps2media.ign.com/media/previews2/image/mgs2/mgs2final_4.jpg

Overhead: http://199.101.98.242/media/shots/66702-Metal_Gear_Solid_The_Twin_Snakes-5.jpg

I was wondering if someone could whip up a script like that for me, or better yet, teach me how.

Thanks.