I am having a problem getting Lion installed on my mac mini. I just purchased it and it is running 10.5. I used my MBP to copy the Lion installer file to a usb stick earlier and successfully upgraded my other MBP from the usb stick so I know it's good. When I try to boot up from the usb stick the screen goes black which may be related to the fact that is connected by hdmi. My only other option is to boot up normally and trying to install lion from the usb stick that way the problem is there is a circle with a line over the lion image and when I try to open it is gives me an error message about unsupported architecture... any ideas?