No mods required.
Version 1.0 of MS-6321 (694D Pro) was able to smp PPGA Celerons.
It has jumpers onboard to enable coppermine (fcpga) or ppga.
Not a good board for o/c thought.
Bad stability , no VIO adj , few fsb steps ... and Vcore is fluctuating a lot between cpu1 and cpu2.