Shoutbox

Well, I think using Process Monitor from Microsoft Technet it's possible to know what registry keys/files have been touched by WLM (it lists accesses from per process basis, and since Plus! is a "module" loaded into WLM process and is not a separate process itself, you probably can't see what files/regs are accessed by Plus! only and what not)

But from my experience still quite a few manual efforts are needed.