Any sighting of the elusive Big Cat?

I think he means the wording is bad, try to rephrase it so it's understandable.

Since the registry is rather huge, and might not be the same as Fiel's registry, it is faster to use Regedit's built-in search function to find sifieldid.
Once running Regedit, press CTRL and F keys at the same time.
Type 'sifieldid' into the 'Find what' box, press Enter or else 'Find Next' button.
Wait a bit depending how fast you computer is.
Done.
(This is for XP, I don't know how different Vista or 7 might be)