About VirtualBox - Linux/Windows
http://www.virtualbox.org/manual/ch01.html
How to Download:
http://www.virtualbox.org/wiki/Downloads
How to Install
http://www.virtualbox.org/manual/ch01.html#intro-installing
FYI
Support USB!!!
http://www.virtualbox.org/manual/ch03.html#settings-usb
http://www.virtualbox.org/manual/ch02.html#idp5524832