Mwilding, first, is the Celeron mounted on a green PCB, or is a CeleronII, which is a socketed version? If its the original slot version, go to Abit's website and d/l the manual for the BH6. On page 2-16 - 2-18 are instructions for mounting the slotted version. If its the socketed CeleronII, then you'll need to get an FC-PGA/Coppermine capable Slotket. Then mount the C2 and a capable HSF. One more thing, if the processor is a CeleronII, then you should upgrade your BIOS to the latest version, which is SS for rev1.0x, SP for rev1.1 BH6's.