Hi Gina. Are you having trouble with the "Congratulations! You have successfully..." ?
If so, go to the main(not admin) directory includes/languages/english folder and open up index.php.
At the bottom, you will see two lines like this;
Code:
define('HEADING_TITLE', 'Congratulations! You have successfully installed your Zen Cart™ E-Commerce Solution.');
Omit both sentences(in red), but most importantly keep the single quotes;
Code:
define('HEADING_TITLE', '');
To protect this modified file and possibly others, insert a new subfolder(named exactly as your current template folder) into that english folder and copy/paste your index.php into there.
Hopefully, that will solve your woe.