Farshu, unfortunately installing Leopard on your PC is quite a complicated procedure as I am finding out for myself. You need to format/partition your hard drive first before you try to install Leopard. You also need to make sure you have the right version of Leopard that is appropriate for your system specs. I would suggest you go to the OSX86 Wikipedia page where there is a comprehensive guide to what versions of OSX work best depending on your system. I know that which type of CPU is a major factor in determining which version of OSX you can install. I have to say that looking at your current setup it seems quite low and you may not be able to run the latest version of OSX on your PC, you may want to consider upgrading your motherboard, CPU and memory. But before you do that have a look at that Wikipedia page I mentioned as well as having a good read through the various guides on this forum.