Comment 5 for bug 269207

To do this we have two options:

a) Add support for it directly into gnome-control-center.

b) Install an .xml file into /usr/share/gnome-control-center/default-apps/ with the following content:

======================
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE default-apps SYSTEM "gnome-da-list.dtd">
<default-apps>
  <mail-readers>
    <mail-reader>
      <name>Google Mail (Prism)</name>
      <executable>prism-google-mail</executable>
      <command>prism-google-mail %s</command>
      <icon-name>prism-google-mail</icon-name>
      <run-in-terminal>false</run-in-terminal>
    </mail-reader>
  </mail-readers>
</default-apps>
======================

However, there is a problem. "prism-google-mail <email address>" doesn't work, so this won't work.

If someone knows how to launch a GMail compose window within Prism please tell me!