I am not sure what command prompt entries you tried but... looks like the BCD is screwed. You could try the below to get your system back
With the repair CD inserted, from the list of recovery tools, select Command Prompt, and enter the following:
Reboot and see if it solves your problem
If that doesn't work, you can substitute that command for the following list (i.e. run the following commands if /fixmbr did not work):
Bootrec.exe /FixBoot --- Writes a boot sector onto the system partition to start Windows
Bootrec.exe /ScanOs ---- Scans all disks for Windows installations and displays them.
Bootrec.exe /RebuildBcd --- Scans all disks for Windows installations and prompts you to pick the ones you want to add to the BCD.
After that, restart the computer and boot from the hard drive. Hopefully, that should solve your problem...