Tried both ways. The initial startup comes on, then I get the Install screen. Install fails. If I try to escape the install, the game just quits and I'm back to the PS home screen. Tried turning on the machine with the disc in, tried with PS already on and put the disk in, etc.
Do you know where the download "resides" before it is actually installed? I would like to trash that file if I could find it. If it was partially installed I'm thinking I may have to reload the entire set of updates -- the thought just occurred to me that one of my nephews may have gotten impatient and turned off the machine mid-install, which I'm sure we all would agree is a bad thing...