Assuming all your RAM is the same size (2GB each, I know) and the same speed (???) and same voltage (???)
You just need to put them all in... and it should be automatic. If not, check your bios for an option and enable it.
Well I'll just shove em all in then and hope for the best.
And yes, they are all the same. Kingston valueram 2gb 800mhz cl5.
But... I'm curious, 3 of them has Elpida chips and 1 has Kingston, should I be worried?