[ubuntu] Install from within Ubuntu?

Hi,

Can I install Ubuntu 12.4LTS from within Ubuntu 12.10? I have a netbook thats has no rom and refuses to boot from USB even though it is set in bios.
I first installed Ubuntu from the windows partition but since I got rid of windows as I was installing Ubuntu the first time this is no longer an option :(

it might be worth saying that I am pretty much a Ubuntu first timer.

Thanks,