I need to disagree here.

The only reason I had to get a new motherboard, was because my old one only supported so much CPU speed. I used the SAME Ram I had and the same HD I had in my old Computer. I had to get a new vid-card, cause the old one was On-Board.

The ONLY operating system I know that will CEASE to work if you switch your tech is Windows XP, so unless hes got that on his computer NOW, there really shoudlnt be a problem.

If his motherboard ONLY supports DDR then yes hes gonna need to get DDR, but the memory he has now and other shit should be AOK.