Fake Dual OS

Its a prank you can try it on your own pc and your friends pc also.
It will display other OS name before booting.

1. First right click My Computer>Properties>Advanced
2. Click Settings in Startup and Recovery.
3. Check Time to display list of Operating System.
4. Then click Edit. You will now open boot.ini in notepad.
5. So this is the time you can create your own fake Dual Boot Operating System.
6. Just copy the last line and paste it under.
7. Inside the quotation marks you can type your new entry there. Ex. "Microsoft Windows Vista Longhorn"
8. Don't forget to press control 's' to save that modified boot.ini
9. Reboot the system to see the effect.

Its tested and working 
Enjoy!