Took up your suggestion and went round looking for P43/45 board. Surpringsly though it had been easier to find the P or G41/ICH 7 than the P43/45 board. Could be just the local peculiarity here in Malaysia.
Any how, I have just ended up with a MSI P43-C51 meant for the Q8400 CPU; and it is about to get even more confusing, for me that is.
Now, I have : 1) ACER Aspire M5641-493x with Q6700 - only change, 4G DDR2 RAM from 3G originally); 2) Palit board with E5200 and DDR2 4G RAM dual channel, on board audio knacked and relying on an old Creative Sound Card with KXproject driver, and on board graphic still okay although currently using Gigabyte GRT220; and finally of course 3) the MSI P43 board and the Q8400 CPU .
Any suggestion as to how , with some minor additional hardwares here and there maybe , could it be juggled such that I end up with 2 General -Use Desktops and a knocked-together machine running Windows Server 2008.