I was excited to get my hands on our family's 'family' copy of Snow Leopard to install on my MacBook running Tiger 10.4.11... I'd checked out tutorials on youtube (http://www.youtube.com/watch?v=loFUyDjCbK8) on how to clean install Snow leopard onto a blank hard disk, and was all set to bring my OS up to date... I inserted the Snow Leopard DVD and restarted and immediately held down the 'c' key and then... 3 minutes or so of the loading icon ticking later and the DVD was rejected and I only had one button to click on, 'Macintosh HD' to start up from. After re-trying several times I thought it was because I was trying to do it with Snow Leopard on my MacBook running Tiger so I tried restarting this time with disk 1 of the Tiger DVD. This was rejected too! So currently I am not able to wipe my hard disk as far as I know because I can't get to this screen to start the process (unless it's possible to do from within Tiger and if it is then I'm just worried that if I wipe it and I can't restart from the DVDs then I'll be in even bigger trouble). Has anyone encountered problems like these and does anyone know of a solution? I've never had any problems with my DVD drive in the past which leads me to suspect it's not because of that. Thanks.