How do install dual channel ram on a K9A2 CF-F, AMD 790X, DDR2 motherboard?

I have a K9A2 CF motherboard I have read the manual but I dont know the correct way to install
dual channel ram. I have two sitcks of 2GB DDR2 GSkill 800mhz ram (4gb in total) do I put both of the
ram sticks in the two green slots or do I put them in the two orange slots?

Thanks for the quick reply I have one last question I am using windows Vista is there any PC application/program that will tell me if I am in dual channel mode or single channel mode?
Thanks in advance

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