An old client is being acquired and our setup and update directories need to be moved to their new system.
Everything has gone as smoothly as could be expected BUT the number of cluster files is causing them to set permissions to every new extension.
If I set the web update to use an IIS Server Image, the numbered portion is appended with an underscore but then the extension is left blank. They don't allow blank extensions.

I checked through the wupdate script but don't see where that is being done (I'm probably in the wrong place)

Is there a way that I could set the cluster file extension to something? Maybe txt or upd - anything so that I don't have contact their (slow) IT folks whenever we push out a new cluster file number?

Thanks any clues you might be able to give me, (even a link to an article that I haven't found yet)

Chris C