I have a notebook comes with vista os, can I install one more xp os with multiboot software? If can what is the software name? Thank before

You could install Partition Magic 8, I believe it will allow you to dual boot OS's. Not sure if you have to boot from the cd or if you can do this in windows.

hope this helps

btw, I would research any problems with dual booting vista and xp before you attempt this. Be very careful if you decide to replace vista with xp, as there can be major problems installing xp on a disk that has had vista.

here is a guide

h**p://apcmag.com/5485/dualbooting_vista_and_xp