Regarding the fan questionl some fans come with both 4 and 3 pin connectors, because the three pin is simply used to monitor the speed of the fan. If the 3-pin connector has only one wire attached, then there should be no problem connecting it in addition to the 4-pin.
"Take up our quarrel with the foe:
To you from failing hands we throw, The torch; be yours to hold it high.
If ye break faith with us who die, We shall not sleep,
though poppies grow, In Flanders fields." - John McCrae, May 1915