You have to put your name in the sudoers list. The only way you can do that is as root.
I personally don't care for running the installer. I let Yum do all of the work. It's much easier this way. Once you obtain the root password, you can put yourself on the sudoers list. Then try to do this.
If worse comes to worst, reinstall and you'll know what the password is.
edit: I just saw you know what the root password is. Run this command from the command line:
You'll be prompted for the root password, enter it. After that, enter the command:
Scroll down to the part where it says
Go right below this, and hit 'a' this will allow you to type there. Enter this:
Code:
username ALL=(ALL) ALL
Hit the escape button. Now go down to where it says:
Code:
# %wheel ALL=(ALL) ALL
Put the cursor in front of the # sign and hit the x button. This will erase it. After you're done, type in :wq and hit enter. This will take you out of editing the file. Now you have to add your username to the wheel list. Put in this command:
Code:
gpasswd -a username wheel
Then type in:
The output from the terminal should be 'root' That's it. You're done, you're officially a sudoer.
Everywhere where it says 'username' is YOUR username.
Regards,
Brandon