My hard drive died (conveniently on the first day of summer school). My
version of Windows XP SP2 came on my laptop. It's barely 2 years old. I have
my product key, but I do not have a boot cd because, of course, none came
with my laptop.

I'm a poor college student; if it weren't for McDonald's Dollar Menu, I'd
also be a starving. How can I install Windows XP again... (cost effectively)?