The issue with the double quotes relates to the construction of the IF test. Essentially, if any part of the expression contains more than one field or word, that part of the expression needs to be enclosed in double quotes.
As for documentation, there is some available via the Insert|Quick Parts|Field dialogue, and some more at:
http://office.microsoft.com/en-us/wo...102110133.aspx?
http://office.microsoft.com/en-us/wo...101830917.aspx
If you want to learn more of what you can do with fields, check out the 'Sticky' threads (all of which I authored) at:
http://windowssecrets.com/forums/for...ord-Processing