[ubuntu] installing ubuntu from usb

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http://ubuntuforums.org – problem greetings to all. im trying to install ubuntu from usb. i have created a usb containing windows xp and ubuntu 12 using winsetupfromusb .when i boot from my usb drive xp works fine but when i choose ubuntu my pc just restarts. Plz help me i wanna use this tool because i want multiple versions of ubuntu and wimdows in same usb drive.or you can tell me about any other tool through which i can create multiboot usb with win xp ubuntu 12 win7 ubuntu 9 etc.(i tried yumi but i doesnt support xp) (Hardware)