Please post the query in Photoshop Forum.
his is Acrobat Install Forums.
Photoshop 5 is a very old software. Which OS are you using?
Photoshop 5 is incompatible with Windows 7 and 8. Consider purchasing the latest version Photoshop Elements 12.
If the code is for an upgrade you also need the code of the product your upgrading.
That CD is known as a "frisbee".