First, I had trouble of getting my installer to recognize my internal hard-drive. After a bit of struggling, I found a post in the Apple Discussion Forum that advised people to wait about 5 minutes or so to get the installer to recognize the hard-drive. And so it did and I was able to get the installation started.

Once the installation was over and rebooted, the computer was stuck in the so called “Blue Screen of Death” for Mac. I forcefully rebooted the machine several times, hoping it will generate the 1.21 Gigawatts of electricity to power up my Leopard but with no luck. Later found out that it was a stupid move that could have fried my hard-drive. And of course, I didn’t have any backup.

After reading through a long thread of posts again in the Apple Discussion Forum, found out that the problem was due to the incompatibility of Application Enhancer (APE) on Leopard and in order to fix the problem I had to either restart the installation process or start up as a single-user mode and manually delete the APE. But oddly for me none of the bootup key sequence was working so I couldn’t restart the installation process nor start up as a single-user mode. So I replaced my keyboard with my previous one and voilà. I could login as single-user mode and delete the files and everything worked fine from then on.

If you are experiencing similar problem, check out this article in Apple Support.