This is really confusing ive done everything you said but still nothing has happened this is what i did.
I turned on my laptop.
I waited for everything to load up and i put my Windows XP SP2 Boot disk in.
I shut down my latop (pressed the windows key then shut down).
I pressed the on button on my laptop.
I waitied for it to load up
I waited for it to ask me if i wanted boot the disk.
Nothing like that came up it just booted vista normally.
I dont know what to do.
Yours , .-=m1k3y=-.