Or if you like to learn, here is the link http://maemo.org/packages/package_in...otify/0.3.0-1/ to the latest version. get root and install with dpkg -i callnotify_0.3.0-1_i386.deb But as it has a few dependencies, you may fail.
Nokia-N900:~# dpkg -l | grep callnotify ii callnotify 0.3.0-2