I'm trying to get through the guide (original post). I started with 10.5.7 installed on the G31M-ES2L. I made my usb stick and went through the steps listed in the OP. Press F12 in start up, select my usb drive, do the install. Then I restart, press f12, select the usb drive again, but it only gives me the option to select a drive to install to again. How do I enable the startup from SATA drive where I installed SL? Am I missing a step between the lines?