Dual Boot of Vista and Leopard in same hd.

[ToroLoco]

I am trying a long time now to have a dual booting system with Vista and Leopard. I have already installed Vista and I have installed later Leopard.

Until now I haven't succeed to enable dual booting on my system and even Ihaven't succeed to boot to Leopard without the installation DVD.

I have decided to start from the beginning and make clean install for both systems Vista and Leopard in the same drive in different partitions.

What is the best guid that I can use which is going to be 100% working since I don't want to spend one day with installations of operating systems and software and not working at the end.