Set up your config.php using the same information as above, plus whatever prefix name you are going to use. You should also have a password for your database. Reupload it, and overwrite the other one.
NOTE: If you are installing 6.5 change the site key to something else, it doesn't matter what, just change it. (it's in config.php)
If you are using a prefix other then nuke you will need to change the sql to reflect the prefix. Use a find a replace function, Do not replace all. There are other references to nuke in the sql. Only change it when it is refering to the database, not when it is text.
Go into phpmyadmin access your database, click on sql, a box will come up below that box is a button that says "browse" click on that and find where your sql is on your machine, then select go (I think that's what the button says)
Once it is finished you should be shown a message saying it was successful.
Go to;
www.yoursite.com/admin.php and make a superuser, it will ask you if you want to make a regular user at the same time. Select YES.
To get rid of the message on the front page, select message in the admin cp, and deactivate or delete it.
Check your site to make sure there are no errors. If there are come back and do a search for that error. If there are not. Go to
Nukecops (you can also do a search there for the errors) Go into downloads and secfix3 and secfix4. Install them seperately and in order. The instructions of how to do it are in each download.