adding an option to username menu

[btappan]

i am looking for a way to modify the dropdown menu in posts that appears when you click on the user's username next to thier post. the menu that says "send email to user", "send private message", "view profile" ect, ect.

what i am trying to do is add an option that says "send user a fax". it would work just like the "send user email" link, but with an email address that is different from their standard address and works through a fax server. an address like 1-555-555-1212@faxserver.com i would have these numbers for each user stored in a custom profile field. anyone know how to accomplish both email and faxing capabilities from this menu?