[ubuntu] Use USB Startup Disk for Fresh Install?

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http://ubuntuforums.org – ):P I have made a startup disk on an 8 GB usb drive of Ubuntu 12.10 Beta 2. I notice that the app I used is called "startup disk creator." I had been thinking it was "startup disc creator." Is this (as a disk) still appropriate for installation (as the equivalent of a live cd)? I've tried to use it to implement a fresh install and, so far, the install option just hangs at the window where I choose the installer to download 3rd party stuff while installing. (Hardware)