Hi, I just got a Mac Mini to use as a HTPC. It came with Snow Leopard installed, but I want to switch back to Leopard. I have a Leopard disc(legal, official disc), but I can't get it to install. I tried inserting the disc and installing from the disc. After I select to install I am prompted to restart the computer, but when I do that the computer just keeps re-booting. I waited for five reboots, but when it did not seem to be working I manually turned off the power. I tried to erase the HD with Disk Utility, but it is grayed out and I can't do anything there either. I tried booting from the disc, but I can't do that either. Can somebody help me out here. This is really frustrating. I can't seem to figure out what the problem is.