remove grub and boot to XP

I haven't downloaded sysinfo because it is another computer I have the problem with.
I told someone that I wanted to get rid of the ubuntu that is duel booted with xp on my desktop computer. Thinking that they were helping me they deleted the ubuntu os. This left me with an inability to access the xp, and a screen that has "grub rescue" on it. I don't know if this it the correct place to post this problem. If it is not please move it and let me know.