TSearch2 Searching Text with Synonyms and Stop Dictionary

Hi,

I´m trying to use the tsearch2 with postgre 8.2. What i am trying to
do its: from a text search the text and synonyms excluding the words
that doesn´t mean nothing like("what", "the", "of").
How can i configure the dictionarys for use both synonyms and stop
dictionarys?
Can anyone create a function that do that?
I´m using the portuguese dictionarys at
http://snowball.tartarus.org/algorithms/portuguese/stemmer.html.

Thanks very much