The latest version of System Center Custom Updates Publisher 2011 is released and ready for download. SCUP 2011 is a freeware tool from Microsoft that can assist you in authoring and publishing 3rd. party updates to Configuration Manager and System Center Essentials.
To get you started you can download the complete SCUP 2011 installation and configuration guide here I hope the guide can save you a few hours of work and get you up and running with SCUP today.
In my guide I have references to two files used to deploy the needed certificates. Those are:
Certutil.exe and certadm.dll, both files are part of the Windows Server 2003 Administration Tools Pack.