Conditions:
1. I have an old laptop. Its CD drive is not working and doesn't have floppy disk drive.
2. It had a problem with its original hard drive, so i replaced it with another hard-drive(formatted).
Query:   Now how can i install Operating System on it?
I've got Microsoft XP and Ubuntu available but I would prefer Ubuntu. I'm looking for genius who can enlighten me and instruct how to install OS on it??
Thanks in advance...