You must open/edit the "Roxio Easy Media Creator 8 Suite.msi" using a Windows Installer editor such as InstallShield or Wise. In this reference I am using InstallShield 11.5 Premiere.
1st. Go to "Property Manager"
2nd. Locate the property "ROX_KEYTEXT", enter your serial number for the value in the format "XX-XXXXX-XXXXX-XXXXX". *(excluding the double-quotes)
3rd. Locate the property "AgreeToLicense", set the value to "Yes".
4th. **Save** the changes to the .MSI. **Do Not recompile".
5th. Finally, you can now run the commandl-line parameters "Setup.exe /qb". NOTE* Use Windows Installer swithches to the Setup.exe. You can also patch the .MSI with the latest update(8.0.5) using "msiexec.exe /p c:\Easy Media Creator 8.msp /a c:\Easy Media Creator 8.msi /qb"