Don't we want to delete lock keys, rather than create them?
You probably have the 5 ways to install the PDF converter KB.
Also, I have been told that the user may need a certain level of security on that printer once it's installed. All in all sounds like some rights issues. I was just doing this today and I noticed this note about term servers .
5.Ensure that the Sage PDF Converter key is present and has 39 values associated with it. If there are no values or if there is only one value that shows ""REG_SZ"", Uninstall then Reinstall the Sage PDF Converter on the Terminal Server.
6.If the Registry key is still not present after reinstalling the Converter, contact Sage Customer Support to provide a copy of it for you, or export it from a working workstation under the same location (HKCC/Software) then import it onto the Terminal Server