Did you start the installer with the following command?
sudo install-owd-hr.sh -ap <alfresco_path> -u <user_name> -p <password>
If so, did you use correct user name and password, as this is what exception tells:
[Invalid user name or password specified]
I do not have any experience with the installer on CentOS or Fedora. The only environments I have tested were Windows XP, Windows 7 and Ubuntu 10.4. But as installation worked on Ubuntu, it should also work on CentOS and Fedora in general.