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How about having a similar feature as GameKnot where you can have a message that pops up and makes a sound when it is your turn to move.This will save having to refresh the board continually and will make games faster.
So many threads... Firefox, greasemonkey, scripts. Google search any of these words and you will find the answer to your question.
Or you could try this - [not sure if it works with Vista]http://home.comcast.net/~johnbart/