i have hp pavilion g4 series laptop with amd processor and preinstalled windows 7 in it. the problem is i want to install windows xp alongwith windows 7. i ve created a seperate partition for windows xp while installation. During installation setup loads and copies file into this but when it intialized its installation a stop error with code 0x7b comes on the screen and it makes me to manully start the system again and again but nothig happens. now i am neither able to start windows 7 nor install xp. i found that my bios doesn't have sata or ide mode that is why it is not installing. now can anybody tell me then how to install windows xp?