Partition disk to have Snow Leopard and Lion?

[Griffi]

When I got my macbook pro a month ago it was right after lion got released. The operating system on my pro was snow leopard but I quickly downloaded Lion. Now I'm regretting that decision because I need Rosetta to run some programs that are critical to my job ( I still really like Lion though). I have searched how to partition my pro but the problem is that apparently I need a snow leopard install disk to partition my disk... something that I do not have. Is there anyway for me to run Snow Leopard without needing the installation disk since my computer came with it? Any help would be great.

 

[MarkG21]

The Install Discs that came with your computer has Snow Leopard on it.

It's the gray dvds

 

[Griffi]

Wow... I did not see those disks there. Thank you!