Before you begin the installation, go into disk utility, and set up your partitions (in HFS+ partition scheme), choose MBR or GUID. Then, select the destination source you want to install Leopard on after quitting disk utility. Customization your installation options (according to your appropriate hardware drivers). Begin the installation, and you should be on the role. That's as concise I can get. Let me know if you need a full guide just in case. =) Whisper me if you need any further support, gladly assist you. ;D