Here are the steps needed for adding the Regression Module to SPSS:
cd \ cd program files\spss
spssactivator <authorization code>
NOTE: If it says that no license could be generated, you will have to call SPSS (800-521-1337) and have them increase the license allowance
SPSS Knowledge Base Article #53942
Regression Module Authorization Code: 7B6A86E025B2D5E84CDF
NOTE: The SPSS Regression Module is a licensed product that must be purchased in addition to SPSS.