I would go one better than that Pol and recommend users implement custom changes as a mod. It is then not necessary to back it up before installing new WOFF UE updates, and much easier to swap in and out as needed.
Anyone needing a basic mod for this purpose can PM me and I will provide it, but the setting options will have to be made by the user.
UPDATE: I have created such a mod and sent it of to Sandbagger for posting on the mods page.
Thanks very much for this mod, Robert. It's just what I needed.