FIRST: If you are moving your site, DO NOT UPGRADE AT THE SAME TIME!!! Do your upgrade BEFORE moving, or AFTER moving, but never DURING the move. Otherwise you'll typically run into problems that can't be quickly resolved because you've got too many server issues confused into the picture. YOU HAVE BEEN WARNED!
1. On your NEW host, create a new MySQL database. Note the username, password, database name, and host name (usually localhost)....
(Before making the following changes, make sure to have a current backup of your files and your database.)
You're going to do three steps: A) edit the configure.php settings and upload them, B) rename the admin folder, C) test login to the new folder.
Details are below:
There is no need to alter the admin configure.php in v1.5.x when renaming your admin folder. Simply proceed to step B.
Using your FTP software or your webhost's File Manager, find your Zen Cart /admin/ directory. Rename the directory to match the settings you just made in step A.
NOTE: DO NOT advertise this new foldername, else you defeat the entire purpose of renaming it. And DO NOT EVER put it in your robots.txt file!
To login to your admin system you will now have to visit a new URL that matches the new name used in steps A and B above.
For example instead of visiting www.example.com/admin/ visit www.example.com/NeW-NamE4u/