There is a useful summary of the hygiene package at the link below for your information. This is not an 'active' link. You will have to copy it and activate it elsewhere. It appears as 'Guide to Hygiene II' in the Links sidebar of this page which will take you directly to it.
http://www.relayresearch.ie/enewsletters/enews_item.asp?item_id=134&enews_id=10