have a question have an hp 8034n pc with 2gb pc4200 memory i would like to add another 2 gb my question is om my motherboard there are 2 blue slots which the 2 sticks are in now and 2 empty black slots if i buy a matched pair of 1gb sticks do i put both of those in the remaining black slots .sounds dumb but hp said i would put 1oem stick and one of the new sticks which is going to be ultra i think in the blue slots and 1 oem and 1 new stick in the other slots .in otherwards they want me to alternate 1-3 -2- 4 with the memory said because to enable the dual channel.help please.