AMD64->AMD64x2: expectations

[jacliburn at bellsouth.net]

I have an AMD Athlon64-based system (socket 939) running FC5 x86_64.  If I wanted to replace the single-core cpu with a dual-core cpu of the same processor family, what might I expect to have to do on the Fedora front?  Would the thing even boot the non-smp kernel currently installed?  Would kudzu cough up a hairball, or does it handle changes to the cpu (in addition to the more customary fleet of peripheral devices)?  If it does bootup properly, is it as simple as just installing the smp kernel and off we go?

Thanks,
Jay