Hopefully F11 gives you boot options so perhaps you could borrow an operating system DVD to boot up the machine and go through the StartUp repair options but it sounds like the hard disk isn't being recognised.
The best thing to do is to take that disk out, buy a converter and slave it to the machine you're posting from then run Checkdisk. At an elevated Command Prompt, use the syntax chkdsk /r so the /r switch can try to fix any disk errors it finds.