Hello William
About the [Adobe LiveCycle Designer 9.0 installation] and the solution for the error [class ID not found in registry], follow SAP Notes may help you.
SAP Note 1522483 - Adobe LiveCycle Designer 9.0 installation.
SAP Note 1449816 - IFbA and Windows 7
SAP Note 1042394 - Updating Interactive Form template with ZCI capability
SAP Note 1055911 - Creating ZCI based interactive Forms in Web Dynpro for Java
Thanks & Kind Regards.
George