Processor Compatibility with LGA Socket

1. You can only use CPU's in there intended sockets (775), so no you cannot use your core 2 duo in a more modern 1155 based system.

2. That motherboard will not be able to use your E8400, it uses socket 1155, you need to find a motherboard which supports LGA775.

Thanks friend you replied as i knew...
you will be thinking that what a silly question i asked...i asked this coz that motherboard has dual socket in one...!! on the other hand if i go for changing the Processor...it will be too costly according to Indian Currency....hehe...;)
thanks for you reply dear friend..