Send message to multiple users from search page

Hi all,

I want my users to be able to send messages to multiple selected users from search page.

1. They will have a select box in front of each profile and once they have selected users, then they can send a message to all of them so they dont have to send message to each person again and again.  (See attached image)  or  http://www.kingsuni.com/pages/messaging-system.png
2. The message box should be default dolphin message box so user can select if they want to send message to other users's email, or just on our site.
3. They should also be able to attach a word file or a image withing the massage.

Let me know if you can do it. 

Many thanks