Hello,
You can create
file association with an application from your package so that the selected program can perform certain operations (verbs) on the files with the specified extension. In order to achieve that you can go in the
File Associations page and create a file association.
Also, you can take a look on the
Create new file extensions and make file associations article which may help you.
Please let us know if that helped, otherwise give us more details.
Best regards,
Dan