I would check for the latest bios from Abit Taiwan. Reason so (the BX-6 Rev. 2) can id the latest Intel procs.
Once that's done, you should check (in the jumperless bios) if it can accomodate 1.5-1.75 V Vcore voltage. It's been awhile since I sold my BX-6 Rev. 2

. Finally check if it supports the multiplier 9.0.
I know (all) Intel procs are multiplier lock'd and (the BX-6 Rev. 2) will (probably) recognize the Celemine and automatically adjust accordingly, but it's just another peace-of-mind issue to know that if (the Jumperless Bios) does not recognize the new proc, you can set it to USER DEFINE and adjust accordingly.