Hi,
Here's a few links that might be helpful:
http://986forum.com/forums/showthread.php?t=5684&highlight=separator (ralegen had some good pictures)
http://986forum.com/forums/showthread.php?t=5825&highlight=separator (delirious also has a good link and some hints of his own)
http://986forum.com/forums/showthread.php?t=7233 (Blink has a write-up)
Also, after clearing the codes, in my experience, it's a normal occurence. (e.g., after I changed out all four of my O2 sensors). Maybe a few of the other folks out there can give you some input.
Anyway, good luck with that! Hope the links are helpful!