Sata hard drives

Hello,
Just installed a new wd320 SATA hard drive to replace a wd160g sata hard drive in a dell dimension e520 running windows xp home.
I am trying to take my pics off the old corrupt hd but am unsure as to how to.
If I have the old hd recogized in the setup, the machine wont boot.
How can I boot the computer w/the new HD but be able to access the old hd to transfer the pics,
if they are still retrievable.