I haven't done this yet myself, but in the top right corner of every post there's a PM icon. When you click on it it open a rivate message with that user. Unfortunately, I don't think you can't yet do a PM for more than one user at a time, so you would have to do that for each of the teams in the central, or if that would take you too long maybe just do it for one and ask to pass it on.
Charlie - on the top left hand corner of this web page (in the white area) the picture of an envelope will appear when you have a PM waiting. Click on it to read it.