Mark,
You can use this setting to point to our help system to files being served in a different location. It does not allow you to replace or edit our help files, however. They are produced in a special format using an Arbortext-provided program. It may be possible to get a copy of this program and make changes to our help files, but it is beyond what we currently support.
We do have an enhancement RFC in the system to provide this functionality. Please contact Integrity Support and open a case with your request if you would like to be added.