I recently replaced my hard drive on my Powerbook G4. I tried to load the OS with the original model specific grey disk that I got when I bought my notebook. When I get to the part where I have to choose the destination where the OS needs to be installed I don't see my hard drive on the display for me to select. The box is empty. I opened disk utility to see if it will recognize my hard drive and I do see a 60Gb hard drive on it. Any idea why this is happening? Thank you.