Suspect I'm missing something obvious here, but any advice would be gratefully appreciated. I've just upgraded my MacBook Air from OS X 10.5 to OS X 10.6. Following the upgrade, I have no iPhoto application. A quick website search suggests that iPhoto (and the other iLife applications) don't come bundled with my cheap Snow Leopard upgrade. (How irritating.) I can download iPhoto 7.1.2 from Apple but it won't install because I don't have an earlier version of iPhoto on my computer. So I insert my OS X installation disk 1 into another Mac, networked, and try to fire that up to install iPhoto from that. It's the disk that came with my MBA. (I think it was OS X 10.4 at that stage.) I assume it should have iLife on it, as did the MBA itself. But when I try to run the installer, over the network, it says: The application "Install Mac OS X" cannot be used from this volume. To install Mac OS X, please use the application provided on the Mac OS X installation disc. And now I can't quite work out what to do. I could switch to another application. But, imperfect though iPhoto undoubtedly is, I've grown used to it. Any suggestions will be gratefully appreciated!