Hi,
If you create Acrobat X Pro Package out of the Suite then you need to include 1 Application like Photoshop and Install and Launch Acrobat X pro first to complete Serialization.
The Seperate key you are referring, is it a Volume Serial No or Retail.
AAMEE 3.1 helps you to create a Package of Suite Products for Volume License and if you only want to deploy Acrobat then use Acrobat Customisation Tool along with your Seperate Serial No and Setup which you can download from the below mentioned link
Download Acrobat -- http://prodesigntools.com/adobe-cs6-direct-download-links.html
Acrobat X Pro Customisation Wizard -- http://www.adobe.com/support/downloads/detail.jsp?ftpID=4950
While downloading Acrobat X pro please ensure to follow (Very Important Instructions) carefully.
Please let me know if yo uneed more information.
Regards,
Abhijit