>We have send out a number of programs which require a setting read from the registry. The installation program Wise adds this entry to the registy, but in this case it has been left out of the installation.
>
>Is there any way I can send them a patch to write this setting to their registry so we don't have to send them a CD?

You could open the Registry in your machine and export a registry node. That creates a *.reg file that you can send them to import (or just double-click on) and register locally.

HTH