I had to switch to a new proxy server, and had to find a way to write the settings for the new proxy to the user's registry. Since the user's SID is in the registrypath to those settings, I had to find a way to get to those settings.
I wrote this small application using AutoIT (a very free and very powerful tool) that does just that. I think the script may be useful for other visitors of the (BTW Fantastic) Novell Cool Tools Solutions site.
Comments on how to use it are in the script