To do this, look towards the top of the screen and click on Utilities from the top menu and then click Disk Utility from the drop-down menu.
To install OS X Snow Leopard from the USB drive, you'll need to reformat the Mac's hard drive. Now that you've created a Snow Leopard USB drive, let's use it to install OS X Snow Leopard as well as access Terminal, Disk Utility, and other OS X utilities.
In the center of the window you'll see two boxes: one labeled Source and another Destination.
