Private Messaging plugin adjustment

I am using the plugin Front End PM ([login to view URL]) for a website of a client. It is a private messaging system on the front end of the website, the client of mine uses it for doctors to email with their clients (or patients) Clients or patients will be given an account with subscriber roles after which they can use the PM system. Here’s an adjustment that i need to be made: I want clients or patients (subscriber role) to be able to choose between 3 recipients (the doctors, who have a different user role). They need to be able to choose that recipients from a simple dropdown menu. I will give you the usernames of the 3 recipients, but their full name needs to be displayed in the dropdown menu, not their username. The 3 doctors will have a different user role and they need to be able to send or reply to anyone, but they can already do that at this point. Also, the plugin has an option to send announcements to all users. I don’t need this option, so I need the ‘announcement’ button removed from the frontend. It would be great if I will still be able to update the Front End PM plugin, so you can make adjustments in [login to view URL] or in a new plugin. If you have any questions, please let me know.