How to share one computer for two users at the same time with VirtualBox?

1. Install VirtualBox and windows xp in the virtual machine.
2. Connect second monitor and enable the DualView.
3. Run the virtual OS and install guest additions.
4. Plug another USB mouse and keyboard.
5. Activate the specific USB device in the virtual OS.
6. Disable "mouse intergration"
7. Done!