hello,
I've done a fresh install of Zen cart v1.5 on Dreamhost (not my hosting choice and NOT one step).

After changing the admin folder name via FTP I get the following error (and no, the folder is no longer called admim and yes I followed the steps on http://tutorials.zen-cart.com/index.php?article=33 (skipping step A as this is version 1.5) :

Not Found

The requested URL /shop/admin/alert_page.php was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

Thanks!