My hard disk crashed.. I can run Ubuntu using a pendrive by making a live USB of Ubuntu, which I made using Windows 7. In the similar way, I want to run Windows XP too using another pen drive (without hard disk) and I want to make it from Ubuntu (12.04). The resources I have are Ubuntu's live USB, Windows XP and Windows 7 installation disk, some blank DVDs but no hard drive. I have very basic knowledge of Linux. Thanks