Mia
There is a list of how courses were scaled in 2001 on the main website. I don't think there will be too many variations for 2002.
underthesun
There are a number of documents that describe the scaling process in detail under the "scaling/uai" section of the main site. If you have specific questions after reading through those, post again here. Attaining a mark below the average in a specific course usually - although not always - means that it will be scaled down. Courses that have scaled means below the default average of 25 will have relatively poor scaling.