>This makes it difficult as my client is adamant that the wants it this way.
>He does not appreciate programs tinkering with his systems settings. Also he wants to install to his network (which I will gladly license him to do) and not have to install on every individual machine. Oh, well I guess this is one I lose.


Your client is not being realistic. Is he running Word, Excel?? They write to the system registry. This is the way software works today...and will continue into the future.