Adobe Photoshop Elements 8

Do you mean you are unable to locate the CDs?  Did you purchase the download option?  If so then please see http://forums.adobe.com/thread/1006208?tstart=0&promoid=KBHJQ for information on how to download the software from your account.

If you have lost the CD then please see http://prodesigntools.com/direct-download-links-for-lightroom-3-and-photoshop-elements-8.html for information on how to download the install files.

Please make sure and make a back up of the install files in case you ever need to install Photoshop Elements 8 in the future.