Based on the amount of typo's in your first post, I don't think you can state without a doubt that you typed the SAME password on install that you are trying now (perhaps your keyboard is messed up). You can boot into single user mode and take a look around, but that too will require a password. If you can't log in with root after booting normally, you will not be able to boot to single user mode and log in either.
Boot with the live cd, mount your / partition somewhere. Find your shadow file (not the one from the live CD, the one your system actually uses), it should be /path/to/where/you/mounted/etc/shadow. Replace the root entry with:
The password will now be "temp1234" without the quotes.
Reboot normally, change your root password to something better, and fix the passwords for your other users.