Well all you can do then is reinstall,
if my memory serves me right, when you do an initial install your cpu architecture is recorded (i386,i686,i586).
So if you're changing chipsets architectures and mobo's, the only thing i can see you doing is a reinstall on new board, and manually backing up your databases, i-bays etc.... etc.......
Please correct me if i'm wrong, I'm no expert!