Devsolit
Ummm where did you see that you need to manually map the data, etc.? osTicket has always had an auto-upgrader. You simply place the new code on the new server, place the latest builds of any currently installed plugins in the new plugin folder, import your database to the new server, copy your old include/ost-config.php file to the include/ folder on your new server, update the config info if changed, visit the site on the new server, login as an admin, run the upgrader.
Cheers.