Posting in the Magento forums has been disabled pending the implementation of a new and improved forum solution which should better serve the community.
For new questions please post at magento.stackexchange.com, the community-run support site for the Magento community. We will be providing updates on the new forum solution soon. For questions or concerns please email firstname.lastname@example.org.
I assume you are running this on a local machine it is easy for you to change configuration. Why don’t you install with all sample data to make sure you have a usable system, then either change the database out or delete the sample data. It is easy to delete you local.xml file and re-install on a fresh database.