Ok I once again ask the great Gods at PCPerspective for priceless wisdom

I have an Acer Aspire one netbook (old one ) that has a corrupt XP on it and I am unable to reinstall XP using the CD via usb cd drive however I can open it up the drive with Ubuntu. So is it possible for me to manually install the missing NTLDR file and what is the process?

I have tried recovery etc nothing works except Ubuntu