VBox is a free download,for now.Somebody is sneaking contribute in there.I see virtual more as a novelty.I use it to look at ISO's and vhd's.It's much fun to install an OS and see it work.I will make a vhd and save it to a DVD.You don't need to make your virtual hard drive all that big either.There's some memory and CPU stuff to adjust and that's interesting.Boot to USB would be great.