ok so i really dont get how a .dmg file works. i thought it was like an .exe, with which i can install applications. but no, when i double click on a .dmg, it like mounts the app as a separate drive, and when i eject that drive the app goes away, and next time i have to mount it again. i donwloaded aMSN just for fun, and this is exactly what happens. i thought dropping a .dmg file into the Applications folder would automatically install it, but no the .dmg file is simply moved into the App folder, and when i double click it's mount as a drive/image.