starting computer from CD drive

[t]

Hi, I'm tring to delete windows xp service pack two off my computer and I'm having trouble I've been on the windows site and found out how to do it but I need to configure my computer to start from my CD drive my computer is a Hp pavilion 6601

                                                               Thanks          

[merlin_2]

hold down either the f1/2 key on boot up......to bring up the bios screen....and change the boot sequence by  using  the arrow keys......boot from cdrom.......

[Corrosive]

To get into the BIOS on my computer I need to press [Del]. Look out for an option whilst your PC is booting up (mine has a message that says 'Press Delete to Enter Setup')