I want to Dual boot my Laptop (Windows XP)and latest ubuntu

view story

http://askubuntu.com – please help..i already made a bootable usb but as i choose to install ubuntu on hard disk my laptop keeps beeping..by the way i downloaded the i386 not the amd64.. please help.. this is my laptop please check http://us.toshiba.com/computers/laptops/satellite/L650/L655D-S5050 (HowTos)