The update of fmms to ver 0.7 is about 96 kB, so it will not take hours to install. With latest firmware I'm talking about ver 1.1.1 that was released in february (if I remember correctly). You have the built-in backup program in N900, that you can use. I think it saves a list of installed applications, to make an easy reinstall of programs installed (don't shoot me if this isn't right. I never had to recover any of my backup. Knock on wood) /oxpo