Hi all, Long time Mac user but never ran across this issue before. I have a mac pro 2006. When I got it a year ago it had Leopard on it working great. I then put windows 7 on it without boot camp just using the drivers needed. I installed that on another drive. Worked swimmingly until I deleted the mac partitions completely and now I can not boot form my Leopard dvd to re install mac os. When I put the Leopard dvd in and hold down C, I hear the dvd drive accessing, but the screen just stays black....I never get the grey screen to even choose the boot cd or windows partition. I do remember once I did the method of holding the control key down to stick the drive I wanted so it booted automatically within the mac boot menu. Now I'm stuck. It boots to windows fine, but never shows me the mac boot / chooser menu at all. I've done all the nvram, pram, resets and that doesnt work. Its like the mac boot loader is gone.... Please help.