[ubuntu] Dual Boot Menu problem

I successfully installed Win XP and Ubuntu 10.04 on my laptop

I was trying to clear up some of the additional boot options created,and by mistake deleted the option to boot WinXP, all I have now is Ubuntu and Ubuntu safe mode.

I know that XP is still there and everything set up fine, I just need to know how to bring the WinXp option back onto the boot menu.

Any suggestions please?

I would prefer not to have to reinstall xp and ubuntu if possible, but if that is the only way....

Many thanks
Alexis