Definitely should write a better how to guide for my add-on
Ok, but before you do anything, please set up a test instance of osTicket to test this out since it modifies the database directly! And don't forget to make a backup when you let this on your live system. We let the script run once a night AFTER we backed up the database... Just in case and even though it's our own script ;)
Basically copy the files onto your web server, open the config_UI.php page in the browser, fill in your database info and so on, save the config and finally sync the data by hitting the button at the end of the page.
Unfortunately discovered recently a bug with the link creation (we use this for our ITDB asset management too), so will try to update/fix that and include a better readme on the repo.
Once set up and working, you can let things run via cron job / scheduled task.
Let me known if it's working for you and when you've some questions don't hesitate to ask me.