You’ll find most of them here tagged under “ instrument definition “ below the thread title, or you can make your own by downloading a blank template and filling in the information, or you could just edit an existing one , by changing the information.
Here’s a link to the definition sub forum
What you need to do is , copy and paste all the text in the box ( comment is the last line ) to a .txt file on your computer then save it , and then drag and drop to the project folder of the hapax sd card .
Make sure your txt editor is set to .txt and NOT rich text , and you want to make sure its format is ut8
Here a thread about doing it on a Mac